Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of November 17 - 21

Monday, November 17

 3:30 INVITED STATISTICS SEMINAR  - Room 459 MSC
      Lev Klebanov, BGSU and St. Petersburg State University
                             for Architecture and Civil Engineering
      Model Construction in Statistical Estimation Theory

Tuesday, November 18

11:30 ALGEBRA SEMINAR  - Room 447 MSC
      Sergey Shpectorov, Dept. of Mathematics and Statistics, BGSU. 
      "A new cover of the 3-local geometry of the Co_1 sporadic 
       simple group"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Kit Chan, Dept. of Mathematics and Statistics, BGSU. 
      "An elementary property of Schauder bases"
      Abstract: I present a well-known necessary and sufficient
        condition for a sequence in a Banach space to be a Schauder
        basis.

 3:30 DEPARTMENT MEETING  - Room 459 MSC
      Discussion and possible approval of proposed tenure/promotion
      document.

Wednesday, November 19

11:30 APPLIED STATISTICS AND OPERATIONS RESEARCH GUEST LECTURE SERIES
      Room 116 Business Administration Building
      Ashwini K. Mathur, SmithKline Beecham Pharmaceuticals
      "Quantification of statistical strength for non-linear models:
       generalizations of correlations and risk measures"

 3:30 INVITED STATISTICS SEMINAR  - Room 459 MSC
      Lev Klebanov, BGSU and St. Petersburg State University
                             for Architecture and Civil Engineering
      Model Construction in Statistical Estimation Theory

Thursday, November 20

 3:30 SCIENTIFIC COMPUTING SEMINAR  - Room 459 MSC
      Daria Filippova, Dept. of Mathematics and Statistics, BGSU. 
      "Numerical simulation of a relativistic ion beam"

Friday, November 21

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Ron Solomon, The Ohio State University
      "Finite Simple Groups:  Past, Present, Future"
      Abstract: Gorenstein called the Finite Simple Group
        Classification endeavor "the Thirty Years' War". Measuring
        from the inception of the problem in the work of Holder and
        Burnside to its final resolution, the "Hundred Years' War"
        would be a better name, though the period of most focussed
        activity was the early 1950's through the early 1980's. This
        talk will briefly discuss the formulation of the problem and
        the important work of the 1890's, then attempt to give a
        picture of the logical structure and principal methods of the
        proof and finally say a few words about current activity
        related to a possible alternate proof and interesting related
        structures.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of November 24 - 25

Tuesday, November 25

11:30 ALGEBRA SEMINAR  - Room 447 MSC
      Valeri Kopytov, University of Novosibirsk
      "Semilinear ordered groups"


HAPPY THANKSGIVING!

No colloquium this week.

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of December 1 - 5

Tuesday, December 2

11:30 ALGEBRA SEMINAR  - Room 447 MSC
      Sergey Shpectorov, Dept. of Mathematics and Statistics, BGSU. 
      "A new cover of the 3-local geometry of the Co_1 sporadic 
       simple group"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Tom Hinrichs, Dept. of Mathematics and Statistics, BGSU. 
      "The evolution of the proofs of the Fundamental Theorem of
       Algebra from d'Alembert to Liouville"

Wednesday, December 3

 3:30 INVITED STATISTICS SEMINAR  - Room 459 MSC
      Lev Klebanov, BGSU and St. Petersburg State University
                             for Architecture and Civil Engineering
      Model Construction in Statistical Estimation Theory

 6:00 KME EVENT  - Room 330 MSC
      David Meel, Dept. of Mathematics and Statistics, BGSU. 
      "Mathematical Assessment:  Kids say the most interesting things"
    
      Pizza and pop will be provided after the talk.

Thursday, December 4

 3:30 SCIENTIFIC COMPUTING SEMINAR  - Room 459 MSC
      To be announced.

Friday, December 5

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      John Anderson, College of the Holy Cross
      "Some ideas in geometric function theory of several complex variables"
      Abstract: In recent years celebrated theorems of classical
        geometric function theory, such as the growth and distortion
        theorems and the Koebe 1/4-theorem, have been generalized to
        certain classes of biholomorphic mappings of the unit ball in
        C^n.  We will survey some of these results, explain a few of
        the ideas in their proofs, and discuss some open questions
        concerning the boundary behavior of these mappings.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of December 8 - 12

Monday, December 8

 3:30 INVITED STATISTICS SEMINAR  - Room 459 MSC
      Lev Klebanov, BGSU and St. Petersburg State University
                             for Architecture and Civil Engineering
      Model Construction in Statistical Estimation Theory

Tuesday, December 9

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Tom Hinrichs, Dept. of Mathematics and Statistics, BGSU. 
      "Laplace, Lagrange, Gauss, and the Fundamental Theorem of
       Algebra at the end of the century (That is the eighteenth
       century, of course)"
      Abstract: D'Alembert and Euler attempted proofs of the
        Fundamental Theorem of Algebra (FTA) in 1746 and 1749
        respectively.  The key to d'Alembert's proof was a
        proposition: if p(z) is a polynomial function and p(z) is not
        zero, then any neighborhood of z contains a point w such that
        the absolute value of p(w) is less than the absolute value of
        p(z). In 1795 Laplace supplied a proof that followed Euler's
        algebraic proof. In 1798 Lagrange wrote a summary of the
        eighteenth century proofs of the FTA. In 1799 Gauss published
        his dissertation in which he critiqued previous attempts at
        proof of the FTA and then supplied his first proof that
        depended upon the topology of algebraic curves. Thus, Gauss
        began a new method of proof for the FTA.

 3:30 FACULTY MEETING  - Room 459 MSC


No colloquium this week.  Next colloquium will be January 16, 1998.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of December 15 - 19

Monday, December 15

 3:30 INVITED STATISTICS SEMINAR  - Room 459 MSC
      Lev Klebanov, BGSU and St. Petersburg State University
                             for Architecture and Civil Engineering
      Model Construction in Statistical Estimation Theory

Tuesday, December 16

 3:30 FACULTY MEETING  - Room 459 MSC
      Meeting with Dean Cranny and Provost Middleton


No colloquium this week.  Next colloquium will be January 16, 1998.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of January 12 - 16

Wednesday, January 14

 3:30 STATISTICS SEMINAR  - Room 459 MSC
      Organizational meeting for seminar by Dr. Jiahua Chen from 
      the Department of Statistics and Actuarial Science at the 
      University of Waterloo.

Friday, January 16

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Josef Blass, Dept. of Mathematics and Statistics, BGSU. 
      "Black-Scholes Formula"
      Abstract:  In 1972 Fischer Black and Myron Scholes developed a
        formula for the valuation of option prices.

        Remarkably the mathematics of the proof is considered by many
        as one of the greatest discoveries of twentieth century
        economics.  In the fall of 1997 Robert Merton and Myron
        Scholes shared the Nobel Prize in Economics for their
        contribution to option pricing.

        In this talk, we will give insight into the formula involving
        discrete, continuous, and finally stochastic approaches to the
        valuation of contingent liabilities.

      AMS web page on the Nobel award
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of January 19 - 23

Tuesday, January 20

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC

 4:30 STATISTICS SEMINAR SERIES - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"
      This is the first in a series of talks.
      The regular meeting time will be Mondays at 3:30.
      
Thursday, January 22

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jim Albert, Dept. of Mathematics and Statistics, BGSU. 
      "Likelihood Inference"

Friday, January 23
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Jon Hall, Michigan State University
      "Steiner triple systems, Moufang loops, and 3-transposition groups"

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of January 26 - 30

Monday, January 26

10:30 GRADUATE STUDENT SEMINAR  - Room 459 MSC
      Organizational meeting.  Contact Norm Preston (npresto@BGNet)

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "What is constructivism?  How does student learning improve by
       using a constructivist approach?"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Curt Bennett, Dept. of Mathematics and Statistics, BGSU. 
      "Buildings: an introduction"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Alex Izzo, Dept. of Mathematics and Statistics, BGSU. 
      "The d-bar equation"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, January 27

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Gordon Wade, Dept. of Mathematics and Statistics, BGSU. 

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Dept. of Mathematics and Statistics, BGSU. 
        After the usual start up issues (meeting time, format, etc.)
        I'll give a quick lecture on Maple basics to start things off.

Wednesday, January 28

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "What is constructivism?  How does student learning improve by
       using a constructivist approach?"
      
 8:00 GUEST SPEAKER  - Room 459 MSC
      Piotr Gasiewski, Price Waterhouse LLP

Thursday, January 29

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jim Albert, Dept. of Mathematics and Statistics, BGSU. 
      "Likelihood Inference"

Friday, January 30
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Biases and variances of survey estimators based on nearest-neighbor
       imputation"
      Abstract: Nearest neighbor imputation is one of the hot deck
        methods used to compensate for nonresponse in sample surveys.
        Although it has a long history of application, theoretical
        properties of the nearest neighbor imputation method are
        unknown.  In this paper we show that under some conditions,
        the nearest neighbor imputation method provides asymptotically
        unbiased and consistent estimators of functions of population
        means and totals, and population distributions and quantiles.
        We also derive the asymptotic variances for estimators based
        on nearest neighbor imputation and consistent estimators of
        these asymptotic variances.  Some simulation results show that
        the estimators based on nearest neighbor imputation and the
        proposed variance estimators have good performances.

        Joint work with Jun Shao, University of Wisconsin
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     Week of February 2 - 6, 1998

Monday, February 2

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "Von Glasersfeld radical constructivism"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Curt Bennett, Dept. of Mathematics and Statistics, BGSU. 
      "Buildings: an introduction"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, February 3

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Gordon Wade, Dept. of Mathematics and Statistics, BGSU. 
      "Introduction to dynamical systems"

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Dept. of Mathematics and Statistics, BGSU. 
        A short sequel to our observation last week about algebraic
        numbers will be offered.  Then, as promised, new Maple
        commands will be discussed, in the context of mathematical
        examples you can bring to a calculus class.  Examples will
        cover differentiation, graphing, implicit differentiation, and
        integration.  Our point of view in a classroom should be
        mathematics, not software.

 3:30 FACULTY MEETING  - Room 459 MSC
      Discussion of the proposed Math 417 and the department's hiring plans

 6:00 KME EVENT  - Room 459 MSC
      Craig Zirbel, Dept. of Mathematics and Statistics, BGSU. 
      "Optimal stopping of Markov chains, or, How to play blackjack"
      Snacks will be provided.

Wednesday, February 4

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "Von Glasersfeld radical constructivism"
      
Thursday, February 5

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jim Albert, Dept. of Mathematics and Statistics, BGSU. 
      "The EM algorithm"

Friday, February 6
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Christian Hirsch, Western Michigan University
      "Emerging secondary school mathematics curricula and their 
       implications for undergraduate mathematics"
      Abstract: The Core-Plus Mathematics Project(CPMP) is one of four
        comprehensive curriculum development projects that were
        awarded grants from the National Science Foundation to design,
        evaluate, and disseminate innovative high school curricula
        that interpret and implement the NCTM Standards. An overview
        of the design, implementation, and evaluation of the CPMP
        curriculum will be provided and the implications for placement
        in, and teaching of, beginning undergraduate mathematics
        courses will be examined. Implications for pre-service
        preparation of high school mathematics will also be addressed
        as time permits.

      Mathematics Education majors and graduate students are especially
      invited to attend.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     Week of February 9 - 13, 1998

Monday, February 9

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "Practical applications of constructivism in the mathematics 
       classroom"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Curt Bennett, Dept. of Mathematics and Statistics, BGSU. 
      "Buildings: an introduction"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Alex Izzo, Dept. of Mathematics and Statistics, BGSU. 
      "More on the d-bar equation"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, February 10

10:30 GRADUATE STUDENT SEMINAR  - Room MSC 459
      Norm Preston, Dept. of Mathematics and Statistics, BGSU. 
      "An approximation theory approach to estimating probability 
       density functions"
      Abstract: In approximation theory, a function is estimated by a
        linear combination of basis functions.  Let X_1, X_2, ..., X_n
        be a random sample taken from a probability density function
        f.  The goal of this talk is to use approximation theory to
        estimate this probability density function.

      Everybody is welcome to attend.  

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      So-Hsiang Chou, Dept. of Mathematics and Statistics, BGSU. 
      "Linearized stability analysis for nonlinear systems"

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Dept. of Mathematics and Statistics, BGSU. 

 3:30 FACULTY MEETING  - Room 459 MSC
      Discussion of the department's hiring plans

Wednesday, February 11

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "Von Glasersfeld radical constructivism"
      
Thursday, February 12

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jim Albert, Dept. of Mathematics and Statistics, BGSU. 
      "Numerical integration"

Friday, February 13
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      J. G. Wade, Dept. of Mathematics and Statistics, BGSU. 
      "Preconditioned iterative methods for regularized inverse problems"
      Abstract: We shall consider numerical methods for solving
        semidefinite least-squares formulations of illposed inverse
        problems, with total variation (TV) regularization. TV
        regularization entails adding a term to the least-squares
        objective functional which penalizes total variation of the
        solution; this term formally appears as (a scalar times) the
        L-1 norm of the gradient.

        The advantage of this regularization is that it improves the
        conditioning of the optimization problem while not
        penalizing discontinuities in the solution, which is
        important in applications. This approach has enjoyed
        significant success in image denoising and deblurring, laser
        interferometry, electrical tomography, and estimation of
        permeabilities in porous media flow models.

        The main drawback with TV regularization is that with it, the
        optimization problem becomes nonquadratic, so that
        mathematical and numerical analysis are both more involved. In
        particular, the first-order necessary condition for minimizers
        (e.g., "setting the first variation equal to zero") yields a
        nonlinear integro-partial differential equation.

        In this talk the following will be described:

        (i) least-squares inverse problems and some interesting examples,
       (ii) the importance of regularization in general and of TV
            regularization in particular, and
      (iii) the current state of numerical methodology for efficient
            treatment of these problems.

        Numerical results will be presented.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                    Week of February 16 - 20, 1998

Monday, February 16

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "Constructivist classrooms:  Are they meaningful in mathematics?"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Curt Bennett, Dept. of Mathematics and Statistics, BGSU. 
      "Buildings and BN-pairs"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, February 17

10:30 GRADUATE STUDENT SEMINAR  - Room MSC 459
      Asoka Ramanayake, Dept. of Mathematics and Statistics, BGSU. 
      "Epidemic Change for the Exponential Distribution"
      Abstract: Consider a sequence of independent random variables
        that are susceptible to changing their distribution at unknown
        instances.  In such a situation, it is of interest to test if
        such changes have occurred or not.  And if such changes have
        occurred, we would like to detect the locations of these
        changes.  This is what is commonly known as the change-point
        problem.  These change-point problems have many applications.
        Quality control procedures, certain medical studies,
        segmentation of speech, would be just a sampling of the many
        possible application areas.

        This work addresses the epidemic model. A sequence of
        independent exponential random variables is hypothesized to
        have equal means, and we would like to test whether the means
        have been subjected to an epidemic change after an unknown
        point, for an unknown duration in the sequence.  The
        likelihood ratio statistic and a likelihood ratio type
        statistic are derived.  The distribution theories and related
        properties of the test statistics are discussed.  Percentage
        points and powers of the tests are tabulated for selected
        values of the parameters.  The powers of these two tests are
        then compared to the two statistics proposed by Aly and
        Bouzar.

      Everybody is welcome to attend.  

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Samantha Gedeon, Dept. of Mathematics and Statistics, BGSU. 
      "Analysis of Nonlinear BVP via Phase Plane Techniques"

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Dept. of Mathematics and Statistics, BGSU. 

Wednesday, February 18

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Dept. of Mathematics and Statistics, BGSU. 
      "Constructivist classrooms:  Are they meaningful in mathematics?"
      
Thursday, February 19

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jim Albert, Dept. of Mathematics and Statistics, BGSU. 
      "Basics of Simulation"

Friday, February 20
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Tze Chien Sun, Wayne State University
      "Limit Theorems for Processes with Long Range Dependence"
      Abstract: First I shall define a process with long range
        dependence.  Then I shall discuss the difference between the
        limit theorems for processes with and without long range
        dependence, and give a survey of recent results in this
        area. If time allows I shall talk about some applications.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                    Week of February 23 - 27, 1998

Monday, February 23

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      David Meel, Mathematics and Statistics, BGSU. 
      "Information-Processing as a mathematical learning theory"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Curt Bennett, Mathematics and Statistics, BGSU. 
      "Buildings and BN-pairs"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Kit Chan, Mathematics and Statistics, BGSU. 
      "Hypercyclicity"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, February 24

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Gordon Wade, Mathematics and Statistics, BGSU.
      "Traveling Waves in Reaction-Diffusion Models"

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Mathematics and Statistics, BGSU. 

Wednesday, February 25

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      David Meel, Mathematics and Statistics, BGSU. 
      "Information-Processing as a mathematical learning theory"
      
Thursday, February 26

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Arthur Yeh, Applied Statistics and Operations Research, BGSU
      "Introduction to the Bootstrap"

Friday, February 27
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Jane Harvill, Applied Statistics and Operations Research, BGSU
      "Testing time series linearity via goodness of fit methods"
      Abstract: Arguably, one of the most crucial aspects of
        statistically analyzing a dataset is proper model
        identification.  This is especially true in time series
        analysis where the statistical model selected must describe
        the deterministic relationship between the past, present, and
        future, and must also describe the randomness inherent in the
        data.  The field of linear time series is well-developed with
        a rich history in application and theory.  Recently, great
        strides in non-linear time series analysis have been made.
        With these advancements, it becomes desirable to develop
        reliable tests for the linearity of a time series.  Strengths
        and weaknesses of existing tests are discussed, and a new
        method for testing time series linearity which makes use of
        the distributional properties of the normalized bispectrum
        will be introduced.  Simulation studies on a general
        application of goodness of fit tests compared to existing
        methods will be presented.  In general, these studies
        indicated the proposed procedure will be more powerful than
        existing techniques.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of March 2 - 6, 1998

Monday, March 2

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Ron Harris, Mathematics and Statistics, BGSU. 
      "Motivation as a determinant for success in mathematics"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Curt Bennett, Mathematics and Statistics, BGSU. 
      "Buildings and BN-pairs"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Kit Chan, Mathematics and Statistics, BGSU. 
      "Hypercyclicity"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, March 3

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Bernarda Elec, Mathematics and Statistics, BGSU. 
      "Examples of Dynamical Systems in Mathematical Ecology"

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Mathematics and Statistics, BGSU. 

Wednesday, March 4

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Ron Harris, Mathematics and Statistics, BGSU. 
      "Motivation as a determinant for success in mathematics"
      
Thursday, March 5

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Arthur Yeh, Applied Statistics and Operations Research, BGSU
      "Resampling methods in regression"

Friday, March 6
      
  No Colloquium this week.  Next Colloquium on Friday, March 20.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     Week of March 16 - 20, 1998

Monday, March 16

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Ron Harris, Mathematics and Statistics, BGSU 
      "Motivation as a factor in mathematics success"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Gernot Stroth, Martin-Luther-Universitat Halle-Wittenberg
      "Amalgams in the theory of finite simple groups"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Craig Zirbel, Mathematics and Statistics, BGSU 
      "The role of measure theory in probability"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, March 17

10:30 GRADUATE STUDENT SEMINAR  - Room 459 MSC
      Ron Harris, Mathematics and Statistics, BGSU 
      "Motivation in mathematics education"
      All are welcome to attend. 

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Vena Pearl A. Bongolan, Mathematics and Statistics, BGSU

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Mathematics and Statistics, BGSU. 

Wednesday, March 18

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Barbara Moses, Mathematics and Statistics, BGSU 
      "Dienes and the theory of mathematical variability"
      
Thursday, March 19

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC

Friday, March 20
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Gernot Stroth, Martin-Luther-Universitat Halle-Wittenberg
      "The sporadic simple groups involved in the classification"
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     Week of March 23 - 27, 1998

Monday, March 23

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Diane Erb, Mathematics and Statistics, BGSU
      "Jerome Bruner and his philosophy of mathematics education"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Corinna Wiedorn, Martin Luther Universitat, Halle-Wittenberg
      "c-Extensions of Petersen type geometries"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, March 24

10:30 GRADUATE STUDENT SEMINAR  - Room 459 MSC
      Daria Filippova, Mathematics and Statistics, BGSU
      "The modeling of relativistic electron beams"
      All are welcome to attend. 

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Craig Zirbel, Mathematics and Statistics, BGSU 
      "Predator-prey models with stochastic noise"
      Abstract: One way to make the standard predator-prey model more
        realistic is to add "noise" to represent random fluctuations
        in birth and death rates for the two species.  This idea will
        be introduced through a discussion of the Euler method for
        numerical solutions and simulations.

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Mathematics and Statistics, BGSU. 

 3:30 FACULTY MEETING  - Room 459 MSC
      Discussion of promotion and tenure document, plus announcements.

Wednesday, March 25

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Diane Erb, Mathematics and Statistics, BGSU
      "Jerome Bruner and his philosophy of mathematics education, part II"
      
Thursday, March 26

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Arthur Yeh, Applied Statistics and Operations Research, BGSU
      "Optimal design"

Friday, March 27
      
 No colloquium this week.  Next colloquium Friday, April 3.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                   Week of March 30 - April 3, 1998

Monday, March 30

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Kay Magaard, Wayne State University
      "The Guralnick-Thompson conjecture for groups of bounded genus"

 3:30 STATISTICS SEMINAR SERIES  - Room 459 MSC
      Jiahua Chen, University of Waterloo, visiting BGSU this semester
      "Empirical Likelihood Methods"

Tuesday, March 31

10:30 GRADUATE STUDENT SEMINAR  - Room 459 MSC
      Vena Pearl Bongolan, Mathematics and Statistics, BGSU

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      So-Hsiang Chou, Mathematics and Statistics, BGSU
      "Cycles and Bifurcation"

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Mathematics and Statistics, BGSU. 

 3:30 FACULTY MEETING  - Room 459 MSC
      Preparation for department retreat this Saturday.

Wednesday, April 1

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      
Thursday, April 2

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jane Harvill, Applied Statistics and Operations Research, BGSU
      "Density estimation"

Friday, April 3
      
 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Grahame Bennett, Indiana University
      "Hardy, Littlewood and Polya revisited"
      Abstract: This is a talk about elementary inequalities and is
        suitable for a general audience. The inequalities to be
        discussed all arose from problems in Functional Analysis, but
        their origins will be described only briefly here. Instead, we
        concentrate on the inequalities themselves, attempting to add
        one theorem to each of the chapters of Hardy, Littlewood and
        Polya's classic work: "Inequalities." The theorems (in keeping
        with the spirit of HLP) need to be easy to state, yet
        not-so-easy to prove, and they need to have pizzazz. Come see
        how to compete with the masters at their own game: if the
        speaker can do it, then so can you! (Or come see the speaker
        fall on his pizzazz.)

***************************************************************************

Saturday, April 4

 9:30 - 3:00  DEPARTMENT RETREAT  - Best Western Falcon Plaza, Bishop Room

***************************************************************************

Monday, April 6

 3:30 COLLOQUIUM  - Room 220 MSC    *** note change of room ***
      C. R. Rao, 1998 Distinguished Lukacs Professor, BGSU
      "Cross Examination of Data"
      Abstract: Statisticians are generally called upon to work on
        data collected by others. In order to understand the data as
        to how they are generated and come to be recorded, and to
        choose a suitable stochastic model for analysis, it is
        necessary to do an initial analysis of data.  Fisher calls
        such an analysis, Cross Examination of Data, which literally
        means questioning the data eliciting answers.  Some possible
        defects occurring in observed data are due to:
            * Unconscious editing of data
	    * Recording and copying errors
	    * Non-random errors
	    * Faking
	    * Contamination and spurious observations, outliers
	    * Incomplete frame of sampling
	    * Nonresponse, and so on.
        How does one detect such defects, and clean the data and make
        adjustments for them in data analysis?  Some examples will be
        given based on the speaker's experience of handling large sets
        of real data.

	There will be a brief introduction of the speaker by Professor
        Gabor Szekely prior to the talk.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                   Week of April 6 - April 10, 1998

Monday, April 6

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Dan Frohard, Wayne State University
      "The Guralnick-Thompson conjecture for groups of bounded genus, II"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Neal Carothers, Mathematics and Statistics, BGSU 
      
 3:30 COLLOQUIUM  - Room 220 MSC    *** note change of room ***
      C. R. Rao, 1998 Distinguished Lukacs Professor, BGSU
      "Cross Examination of Data"
      Abstract: Statisticians are generally called upon to work on
        data collected by others. In order to understand the data as
        to how they are generated and come to be recorded, and to
        choose a suitable stochastic model for analysis, it is
        necessary to do an initial analysis of data.  Fisher calls
        such an analysis, Cross Examination of Data, which literally
        means questioning the data eliciting answers.  Some possible
        defects occurring in observed data are due to:
            * Unconscious editing of data
	    * Recording and copying errors
	    * Non-random errors
	    * Faking
	    * Contamination and spurious observations, outliers
	    * Incomplete frame of sampling
	    * Nonresponse, and so on.
        How does one detect such defects, and clean the data and make
        adjustments for them in data analysis?  Some examples will be
        given based on the speaker's experience of handling large sets
        of real data.

	There will be a brief introduction of the speaker by Professor
        Gabor Szekely prior to the talk, and a reception after the talk.

Tuesday, April 7

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Mathematics and Statistics, BGSU. 

Wednesday, April 8

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      
Thursday, April 9

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jane Harvill, Applied Statistics and Operations Research, BGSU
      "Density estimation"

***************************************************************************

Monday, April 13
      
 3:30 STATISTICS SEMINAR  - Room 459 MSC
      C. R. Rao, 1998 Distinguished Lukacs Professor, BGSU
      "Statistical Solutions of Matrix Algebra" 

***************************************************************************

Monday, April 20

 3:30 STATISTICS SEMINAR  - Room 459 MSC
      C. R. Rao, 1998 Distinguished Lukacs Professor, BGSU
      "Pre- and Post-Least-Squares: The Emergence of Robust Estimation" 

Friday, April 24
 
 9:00 Lukacs Symposium begins  - Room 115 Olscamp Hall

***************************************************************************

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     Week of April 13 - April 17

Monday, April 13

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Oxana Grinevitch, Mathematics and Statistics, BGSU   
      "Skinner, behaviorism and mathematics learning"

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Landazuri-Seitz-Zalesskii bound"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Neal Carothers, Mathematics and Statistics, BGSU 
      "Riesz bases II"
      Abstract: We will discuss Bari's Theorem and the Kothe-Toeplitz
        Theorem on unconditional bases in Hilbert space.  This is a
        continuation of last week's talk, but is based largely on
        elementary principles.  The talk should be accessible to any
        student in MATH 766.
                
 3:30 LUKACS LECTURE  - Room 459 MSC
      C. R. Rao, Distinguished Lukacs Professor, BGSU
      "Statistical solutions to matrix problems"
      Abstract: Most of the propositions in the theory of Linear
        Estimation and Multivariate Analysis are proved using results
        of Matrix Algebra.  It is shown that some of the key results
        in Matrix Algebra can be derived from certain propositions in
        mathematical statistics, whose derivation does not depend on
        matrix theory.

        We exploit two results in mathematical statistics for this
        purpose.  One is that Fisher information in the whole sample
        is not less than the information in a statistic.  Another is
        that the variance-covariance matrix of a vector random
        variable is non-negative definite.

        The following results will be discussed: Convexity of A
        inverse and A squared in the space of positive-definite
        matrices; Milne's inequality; Non-negative definiteness of
        Schur complement, Hadamard and Kronecker products of matrices;
        Kantorovich inequality using linear programming and so on.

Tuesday, April 14

11:30 GRADUATE STUDENT SEMINAR  - Room 459 MSC
      *** Note change of time ***
      John Steele, Mathematics and Statistics, BGSU 
      "Limiting distributions for hierarchical structures"
      All are welcome to attend.
      Abstract: Limiting distributions have been a focus of study in
        probability for some time.  The Central Limit Theorem for sums
        of random variables and the asymptotic normality of many other
        statistics are often used to provide useful approximations of
        probabilities.  In the field of Reliability the well known
        limiting distributions for minimum and maximum of observations
        are often used.  These are usually discussed in terms of
        limiting distributions arising from "series" structures in the
        case of minimum observations and "parallel" structures in
        terms of maximum observations.  The type of structure relates
        to the actual design of a system or network.  In this talk I
        shall generalize some of the notions used in determining these
        limiting distributions to other structures beyond the series
        and parallel cases.  The idea of a limiting distribution will
        come from the repeated composition of the structure upon
        itself.  For the series and parallel cases this yields results
        consistent with those already well known.  I'll be able to
        show that for most structures there is an analytic limiting
        distribution.  While necessary and sufficient conditions for
        distributions to be within the domain of attraction of a
        particular limiting distribution do still remain elusive I
        will show some conditions of sufficiency.  Along the way to
        these results interesting observations concerning coherent
        structures and their related reliability polynomials are
        highlighted.

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC

 2:30 MAPLE WORKSHOP  - Scientific Computing Lab, MSC
      John Gresser, Mathematics and Statistics, BGSU. 

 3:30 FACULTY MEETING  - Room 459 MSC
      Followup on the department retreat last Saturday.

Wednesday, April 15

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      Oxana Grinevitch, Mathematics and Statistics, BGSU 
      "Skinner, behaviorism and mathematics learning"
      
Thursday, April 16

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jane Harvill, Applied Statistics and Operations Research, BGSU
      "Density estimation"

****************************************************************************

Monday, April 20

 3:30 LUKACS LECTURE  - Room 459 MSC
      C. R. Rao, Distinguished Lukacs Professor, BGSU
      "Pre- and Post-Least-Squares: The Emergence of Robust Estimation" 
      Abstract: From the time of Ptolemy, astronomers were faced with
        the problem of obtaining best estimates of unknown parameters
        from measurements subject to error.  Various attempts, partly
        objective and partly subjective were made during the last five
        centuries, which finally led to the discovery of the method of
        least squares (LSE) in the beginning of the last century in
        which Gauss (1777-1855) and Laplace (1749-1827) played major
        roles.  Subsequent contributions by Markoff, Aitken, Bose, and
        Rao provided generalizations of LSE to cover a number of
        practical situations.  A historical account of the development
        of LSE will be presented.

        LSE has nice properties when errors are normally distributed.
        However, they are sensitive to departures from normality and
        the presence of outliers.  Some of the latest methods in what
        is called M-estimation, which are robust to model deviations
        and outliers will be discussed.

Friday, April 24
 
 9:00 Lukacs Symposium begins  - Room 115 Olscamp Hall

Saturday, April 25

 8:00 Lukacs Symposium continues

Sunday, April 26

 8:00 Lukacs Symposium continues

***************************************************************************

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     Week of April 20 - April 24

Monday, April 20

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC

 2:30 ANALYSIS SEMINAR  - Room 459 MSC
      Neal Carothers, Mathematics and Statistics, BGSU 
      "Riesz Bases III"
      Abstract: The continuing saga of unconditional bases in Hilbert
        space.
                
 3:30 LUKACS LECTURE  - Room 459 MSC
      C. R. Rao, Distinguished Lukacs Professor, BGSU
      "Pre- and Post-Least-Squares: The Emergence of Robust Estimation" 
      Abstract: From the time of Ptolemy, astronomers were faced with
        the problem of obtaining best estimates of unknown parameters
        from measurements subject to error.  Various attempts, partly
        objective and partly subjective were made during the last five
        centuries, which finally led to the discovery of the method of
        least squares (LSE) in the beginning of the last century in
        which Gauss (1777-1855) and Laplace (1749-1827) played major
        roles.  Subsequent contributions by Markoff, Aitken, Bose, and
        Rao provided generalizations of LSE to cover a number of
        practical situations.  A historical account of the development
        of LSE will be presented.

        LSE has nice properties when errors are normally distributed.
        However, they are sensitive to departures from normality and
        the presence of outliers.  Some of the latest methods in what
        is called M-estimation, which are robust to model deviations
        and outliers will be discussed.

Tuesday, April 21

10:30 ALGEBRA SEMINAR  - Room 447 MSC
      *** Note change of day and time ***
      Pham Huu Tiep, Ohio State University
      "Low dimensional representations of finite groups of Lie type in
       cross characteristics"

11:30 GRADUATE STUDENT SEMINAR  - Room 459 MSC
      *** Note change of time ***
      Tom Hinrichs, Mathematics and Statistics, BGSU 
      "The Theory of Equations in the Eighteenth Century"
      As always, all are welcome to attend. 
      Abstract: An eighteenth century look at the theory of equations
        and its relation to the Fundamental Theory of Algebra
        (FTA). This is a quick review of the evolution of the FTA from
        Leibniz to Lagrange.

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Gordon Wade, Mathematics and Statistics, BGSU 
      "Semigroups as a generalization of the matrix exponential"

Wednesday, April 22

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 447 MSC
      
 6:00 KME INITIATION BANQUET  - Mileti Alumni Center, BGSU
      Initiation ceremony and the KME award for Excellence in Teaching
      Mathematics will be presented. There will also be a talk.
      Cost is $15 per person.  Contact Curt Bennett, 372-7451.

Thursday, April 23

 1:00 STATISTICAL COMPUTING SEMINAR  - Room 459 MSC
      Jane Harvill, Applied Statistics and Operations Research, BGSU

Friday, April 24
 
 9:00AM Lukacs Symposium begins  - Room 115 Olscamp Hall
      "Statistics for the 21st Century"
      Organized by C. R. Rao, Distinguished Lukacs Professor

      The Symposium is open to the entire University community and the
      public.  There is no need to register.  You may come to
      whichever talk(s) you like.

      There will be about 31 talks covering a wide range of topics in
      statistics and probability.  For details of the schedule and the
      topics of the talks, please see the link above or contact Craig
      Zirbel at 372-7466

 1:30PM Lukacs Symposium continues  - Room 220 Math Science Building

 7:00PM Mixer at Best Western Falcon Plaza, Bishop room
      All speakers, guests, and participants are invited.
      This is an informal, buffet-style dinner.

Saturday, April 25

 8:00AM Lukacs Symposium continues  - Room 220 Math Science Building

 7:00PM Lukacs Symposium Banquet  - Kaufman's at the Lodge
      Invited guests only.  Seating is extremely limited.

Sunday, April 26

 8:00AM Lukacs Symposium continues  - Room 220 Math Science Building

12:00PM KME PICNIC  - Bowling Green City Park
      Officers for next year will be chosen. Please RSVP to the
      departmental secretary (372-2636) so that we will know how much food
      to have on hand. There is no charge for this picnic.  Rain date May
      3rd.

 1:30PM Lukacs Symposium concludes


***************************************************************************

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                       Week of April 27 - May 1

Monday, April 27

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 445 MSC
      Barbara Moses, Mathematics and Statistics, BGSU 
      "Relational versus instrumental understandings in math"

 2:30 ANALYSIS SEMINAR  - Room 459 MSC

 2:30 ALGEBRA SEMINAR  - Room 447 MSC
      K. Lux, University of Arizona
      "An Enhancement of the MeatAxe and related Algorithms"

Tuesday, April 28

 2:30 SCIENTIFIC COMPUTATION SEMINAR  - Room 459 MSC
      Daria Fillipova, Mathematics and Statistics, BGSU 
      "Shock waves in flow models"

Wednesday, April 29

11:30 MATHEMATICS EDUCATION SEMINAR  - Room 445 MSC
      Barbara Moses, Mathematics and Statistics, BGSU 
      "What has the research told us about mathematics teaching?"
      
Sunday, May 3

12:00 KME PICNIC  - Bowling Green City Park
      Officers for next year will be chosen. Please RSVP to the
      departmental secretary (372-2636) so that we will know how much food
      to have on hand. There is no charge for the picnic.


Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                    Week of August 31 - September 4

Monday, August 31

3:30 STATISTICS SEMINAR ORGANIZATIONAL MEETING  - Room 459 MSC
     Contact Craig Zirbel if you are interested in the seminar
     but are unable to attend this meeting.

Tuesday, September 1

3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
     Sergey Shpectorov, Mathematics and Statistics, BGSU 


The first colloquium of the semester will be on Friday, September 11.

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of September 7 - 11

Monday, September 7

Labor Day.  No classes or seminars.

Tuesday, September 8

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern - Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: structure and examples"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Wednesday, September 9
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Jim Albert, Mathematics and Statistics, BGSU 
      "Introduction to Bayesian Prediction:  
         How many home runs will Mark McGwire hit?"

 7:00 WORKSHOP ON TEACHING FRESHMAN MATH & STATISTICS  - Life Sciences 212
      The workshop will be led by a panel consisting of Dan Madigan
      (Center for Teaching Learning and Technology), Bill Knight
      (Office of Institutional Research) and the coordinators of our
      freshman courses.  All faculty and graduate students are
      encouraged to attend.

Thursday, September 10

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Friday, September 11

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Gabor Szekely, Mathematics and Statistics, BGSU 
      "Mathematical Uncertainties"
      Abstract: Why do balls play a role in geometry similar to normal
        distributions in statistics?  How can we use the Heisenberg
        uncertainty principle in statistics?  Why is this principle
        equivalent to the classical Cramer-Rao inequality?  All these
        questions can be answered with the help of a 1948 paper by
        C. E. Shannon.  The scientific world is going to celebrate him
        next month. (This talk is part of an invited AMS talk the
        speaker will give in Gainesville, Florida.)

 5:30 DEPARTMENT PICNIC  - Carter Park, pavilion located by playground
      All Mathematics and Statistics faculty, graduate students, and
      their families are invited.  There is a sign-up sheet for dishes
      to bring and transportation in the coffee room (Room 459).
      Contact Diane Erb (dianeer@bgnet.bgsu.edu) for more information.

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of September 14 - 18

Monday, September 14

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Kit Chan, Mathematics and Statistics, BGSU 
      "Hypercyclicity and universality -- an overview"

Tuesday, September 15

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: structure and examples"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Wednesday, September 16
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Gabor Szekely, Mathematics and Statistics, BGSU 
      "Quadratic forms in statistics: a new method for constructing tests"

Thursday, September 17

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Friday, September 18

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "The ring of quotients of C(X) determined by the fixed filter F"
      Abstract: Recall that the classical ring of quotients of a
        commutative ring A with identity, 1, may be obtained as the
        set of all fractions of elements in the ring A, where the
        denominators are non-divisors of zero (or regular elements.)
        Our ring in question is C(X) the ring of all real-valued
        continuous functions from the topological space X.  Denoting
        the classical ring of quotients of C(X) by q(X) we may obtain
        q(X) as a direct limit q(X) = lim C(U), where the U range over
        all dense cozerosets of X.

        (Here a cozeroset of X means a set which is realized as the
        inverse image of the set of nonzero real numbers, under a
        continuous function.)  The collection of all dense cozerosets
        forms a nice set; in particular it is closed under finite
        intersections and unions.

        In the remaining minutes, we shall discuss the ring of
        quotients obtained by taking the above direct limit, but where
        the sets U are assumed to simply be co-finite subsets of X.
        We shall characterize those spaces X for which this ring of
        quotients is contained in q(A).

Saturday, September 19

 8:30 Breakfast
 9:00 FACULTY RETREAT  - Nazareth Hall, Grand Rapids
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                      Week of September 21 - 25

Monday, September 21

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Kit Chan, Mathematics and Statistics, BGSU 
      "Hypercyclicity and universality -- an overview part 2"

Tuesday, September 22

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett and Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Wednesday, September 23
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Craig Zirbel, Mathematics and Statistics, BGSU 
      "Rate of convergence for Markov chains"

Thursday, September 24

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett and Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Friday, September 25

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Juan Bes, Mathematics and Statistics, BGSU 
      "Hypercyclic operators"
      Abstract: Let X be an F-space (i.e., a complete linear metric
        space). A continuous linear operator T on X is said to be
        hypercyclic, provided there is some x in X whose orbit { x ,
        Tx , T^2x, .... } is dense in X.  If so, x is called a
        hypercyclic vector for T.

        This notion arises naturally in the study of invariant
        subsets, but it may also be traced back to a theorem of
        G. D. Birkhoff in 1929, that shows the existence of a
        "universal" entire function f whose set of translates {f(z+1),
        f(z+2), .... } approximate, over any compact set, any entire
        function as accurately as desired.

        We will state a "Birkhoff" theorem for the complete algebra
        generated by the dual of a Banach space, a characterization of
        those operators whose direct sum T+T is hypercyclic, and some
        results concerning the sets of hypercyclic vectors.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                    Week of September 28 - October 2

Monday, September 28

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Kit Chan, Mathematics and Statistics, BGSU 
      "The hypercyclicity criterion"

Tuesday, September 29

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett and Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Wednesday, September 30
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Truc Nguyen, Mathematics and Statistics, BGSU 
      "Some characterizations of normal distribution and EDF
       goodness-of-fit test"

Thursday, October 1

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett and Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Friday, October 2

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Waldemar Weber, Mathematics and Statistics, BGSU 
      "Finding Preferential Personality Types and Learning Styles in
       Mathematics"
      Abstract: Students learn mathematics about as many different
        ways as we teach it.  This colloquium presentation begins by
        reviewing how Katharine Briggs and Isabel Myers made the
        personality theories of Carl Jung operationally accessible.  A
        logically equivalent but indirect algorithm is then proposed
        so that forced choices obtain more flexible formulations.  The
        resulting instrument, which remains under development, will be
        demonstrated by an interactive program.  I will try to finish
        by illustrating how instructors can use the student profiles
        that it produces to become more effective as they work with
        individual students.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                         Week of October 5 - 9

Monday, October 5

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Kit Chan, Mathematics and Statistics, BGSU 
      "Hypercyclic entire functions"

Tuesday, October 6

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett and Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Wednesday, October 7
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      John Steele, Mathematics and Statistics, BGSU 
      "Limiting distributions for hierarchical structures"
      Abstract: The Central Limit Theorem for sums of random variables
        and the asymptotic normality of many other statistics are
        often used to provide useful approximations of probabilities.
        In the field of Reliability the well known limiting
        distributions for minimum and maximum of observations are
        often used.  These are usually discussed in terms of limiting
        distributions arising from "series" structures in the case of
        minimum observations and "parallel" structures in terms of
        maximum observations.  In this talk I shall generalize some of
        the notions used in determining these limiting distributions
        to other structures beyond the series and parallel cases.

Thursday, October 8

 3:00 FACULTY MEETING  - Room 459 MSC
      Discussion of the actuarial program

Friday, October 9 - Saturday, October 10

 MAA meeting in Columbus
 
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of October 12 - 16

Monday, October 12

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Juan Bes, Mathematics and Statistics, BGSU 
      "Hypercyclic vectors"

Tuesday, October 13

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

Wednesday, October 14
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Norm Preston, Mathematics and Statistics, BGSU 
      "Bayesian residual-based model checking"
      Abstract: Statistical modeling has become one of the main tools
        in science and industry.  By using these models, data can be
        analyzed and inferences can be made about the population in
        which the data came from.  In this talk, the Bayesian approach
        to generalized linear models will be presented.  In
        particular, Bayesian residuals used in the selection and
        criticism of these models will be examined.  Additionally, the
        Bayesian and Classical statistics approach to residual-based
        model checking will be compared.

Thursday, October 15

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett and Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

Friday, October 16

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Anthony B. Evans, Wright State University
      "Mutually orthogonal latin squares based on groups"
      Abstract: One way to construct sets of mutually orthogonal Latin
        squares (MOLS) is to start with the multiplication/addition
        table of a finite group and create further squares by
        permuting its columns.  In this talk we will examine some
        simple classes of permutations that have been used in the
        construction of MOLS and maximal sets of MOLS.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of October 19 - 23

Tuesday, October 20

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

 3:30 FACULTY MEETING  - Room 459 MSC
      Discussion of program review

Wednesday, October 21
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Edsel Pena, Mathematics and Statistics, BGSU 
      "Estimation from recurrent data accrued via an informative
       sum-quota stopping rule"
      
Thursday, October 22

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett and Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Witt design and the sporadic Mathieu groups"

 6:00 ACTUARIAL SCIENCE SOCIETY  - Room 459 MSC
      PJ Gabel and Peter Gasiewski, Price Waterhouse Coopers
      
      The BGSU Actuarial Science Society presents BGSU graduates PJ
      Gabel and Peter Gasiewski of Price Waterhouse Coopers.  They
      will discuss their brand of actuarial science, as well as the
      inner workings of their Chicago firm.  All are invited and
      questions are welcome.  For more information, contact Jeff
      Faber (jfaber@bgnet).

Friday, October 23

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Chi Song Wong, University of Windsor
      "Redistribution of wealth with applications to optimal designs"
      Abstract: Majorization deals with re-distribution of wealth of n
        people: the wealth of person i is changed from xi to yi.  The
        distribution (yi) is majorized by the distribution (xi) if for
        any k, the total wealth of the k most poor people in (yi) is
        no less than the total wealth of the k most poor people in
        (xi).  This notion was introduced near the beginning of this
        century.  Characterizations of majorization are available in
        terms of geometry, probability, convex functions and linear
        algebra; the proofs for equivalences involve several
        fundamental results in functional analysis.

        This is a survey talk; it gives no proofs.  The introduction
        will end with the joint work of the speaker and several
        co-authors.

        Majorization should be defined in terms of stochastic
        processes while 'poverty' demands a simple and practical
        definition. The speaker wishes to relate these two notions.

        Majorization gives rise to a giant factory for producing
        inequalities and thus has a wide range of applications.  The
        speaker was attracted by this notion as a result of searching
        for optimal designs and multivariate admissible rules in
        statistics; he will demonstrate how inequalities are produced
        through majorization.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     BOWLING GREEN STATE UNIVERSITY
          DEPARTMENT OF MATHEMATICS AND STATISTICS CALENDAR
 
                        Week of October 26 - 30

Monday, October 26

12:30 APPLIED MATHEMATICS SEMINAR  - Room 400 MSC
      So-Hsiang Chou, Mathematics and Statistics, BGSU 
      "Raviart-Thomas spaces"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Juan Bes, Mathematics and Statistics, BGSU 
      "Hypercyclic Vectors, II"

Tuesday, October 27

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Leech lattice and Conway groups"

Wednesday, October 28
 
 2:30 STATISTICS SEMINAR  - Room 459 MSC
      John Carson, Mathematics and Statistics, BGSU 
      "One-sided multivariate inference"
      
Thursday, October 29

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Leech lattice and Conway groups"

Friday, October 30

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      John Gresser, Mathematics and Statistics, BGSU 
      "Maple as an idea instrument"
      Abstract: We have all engaged in the struggle to take
        mathematics beyond computation, to teach it as a discipline of
        ideas as well as one of computation .  When we are lucky
        enough to have a receptive audience that buys into our world
        of ideas, we all know what to say, and the experience is both
        joyful and successful.  Oh yes, this is how mathematics should
        be taught.

        As we all know, however, this process does not work with most
        of our undergraduate students.  We still teach ideas, but our
        students largely ignore them, and concentrate instead on
        memorization and calculation.  It is easy to see why.  Our
        calculations are so complicated, that students focus all of
        their attention on calculation, rather than ideas.  Students
        actually like calculation.  It's an escape, something they can
        do without thinking. Furthermore, our exams are often too long
        and too crammed with calculation, which only reinforces
        memorization and calculation as the tools of choice in their
        war against bad grades.

        This is not an easy problem to fix, and Maple is no panacea,
        but it can certainly be used to promote mathematical
        understanding.  With Maple, students can focus all of their
        energy on IDEAS and let the computer take care of the
        calculations.  Additionally, it makes our students active
        participants in the process, so they have no choice but to
        climb on board.  It is a wondrous opportunity for the teaching
        of mathematics as a discipline of ideas.

        Do students like Maple?  Some students obviously get very
        excited about it.  Many others do not like it at all.  It
        takes away most of their computational responsibilities (which
        they find comforting), and puts them in charge of all the
        ideas (which they are unsure of).  Admittedly, there are some
        Maple idiosyncrasies that can deal a severe blow to a
        mathematical exercise, and this contributes in a minor way to
        student stress, but a little experience in working with Maple
        quickly eliminates most of these difficulties.  Problems are
        usually mathematical, often resulting in mathematically
        ill-defined input statements.  To communicate with a computer,
        students must express themselves logically, and precisely.
        But surely, this is something we wish to promote anyway.

        The purpose of this talk is not to teach Maple, but to show by
        example how it can be used to promote ideas.  Some examples
        are very elementary, others are more complicated.  A few might
        even be exciting.  You might be surprised by what our students
        are capable of doing with this technology.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                     BOWLING GREEN STATE UNIVERSITY
          DEPARTMENT OF MATHEMATICS AND STATISTICS CALENDAR
 
                        Week of November 9 - 13

Monday, November 9

12:30 APPLIED MATHEMATICS SEMINAR  - Room 400 MSC
      J.Gordon Wade, Mathematics and Statistics, BGSU 
      "Mixed finite element methods"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Juan Bes, Mathematics and Statistics, BGSU 
      "Hypercyclic Vectors, IV"

 7:30 KME SPEAKER  - Room 459 MSC
      Dr. Paul Boisen, National Security Agency
      "Coffee cups, nephroids, and envelopes"

      Information on this presentation can be found at: 
      http://www.cacr.caltech.edu/~roy/Caustic/

      In addition, Dr. Boisen will be available to talk with students
      on Monday morning from 9:30-11:30 in MSC 400, and off and on
      throughout the afternoon in the undergraduate reading room.  He
      has pamphlets and other information about careers and internship
      programs at the NSA.  If anyone wants to set up a time to meet
      with Dr. Boisen, please contact Curt Bennett (cbennet@bgnet).
      He will be taken to lunch at 11:30.

Tuesday, November 10

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Leech lattice and Conway groups"

Wednesday, November 11
 
 Veterans' Day.  No classes or seminars are scheduled.
      
Thursday, November 12

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Leech lattice and Conway groups"

 7:00 ACTUARIAL SCIENCE SOCIETY SPEAKER  - Room 459 MSC
      Watson Wyatt Worldwide will present a synopsis of what they do.

Friday, November 13

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Myles Hollander, Florida State University
      "CENSORED!"
      Abstract: Being a statistician is a little like being a
        detective. We are often dealing with data and looking for
        clues in data.

        What do the data reveal?

        What conclusions should be drawn?

        What decisions should be made?

        What models can we build to make predictions for similar
        situations?

        In some situations the data exist to tell the story but they
        are obscured, blurred by confusing or selective
        presentation. The first case he will discuss is one such
        situation.

        In some other situations the data are incomplete or censored
        because some of the subjects in the study have not yet
        experienced the event of interest, such as relapse in a
        clinical trial. The second part of his talk is about such
        censored situations.

        The talk is designed for a general audience.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                       Week of November 16 - 20

Monday, November 16

12:30 APPLIED MATHEMATICS SEMINAR  - Room 400 MSC

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Ron Taylor, Mathematics and Statistics, BGSU 
      "A Hilbert subspace of hypercyclic vectors"

Tuesday, November 17

10:30 FACULTY MEETING  - Room 459 MSC
      Dean Cranny and Marshall Rose (Affirmative Action Office)
      Hiring Strategies of Successful Searches

 3:30 FACULTY MEETING  - Room 459 MSC
      Program Review Unit Plan

Wednesday, November 18

 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Arjun Gupta, Mathematics and Statistics, BGSU 
      "Elliptically contoured models in statistics"
      
Thursday, November 19

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Leech lattice and Conway groups"

 7:00 ACTUARIAL SCIENCE SOCIETY SPEAKER  - Room 459 MSC
      Nationwide Insurance, Columbus, Ohio
      Interviews will be conducted on Friday

Friday, November 20

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Karl Grosse-Erdmann, Fernuniversitat Hagen/Ohio University
      "Murphy's law in analysis"
      Abstract: The study of hypercyclic operators on Banach spaces
        has been pursued intensively over the last decade, leading to
        several exciting new results and some intriguing open
        problems. Recall that an operator T on a Banach space X is
        called hypercyclic if it has a dense orbit, i.e., if for some
        x in X the set {T^n x : n >= 0} is dense in X. While the
        theory of hypercyclicity only started almost 30 years ago with
        a paper by S. Rolewicz, there is a prehistory that dates back
        to the beginning of the century. In this expository talk I
        shall discuss hypercyclicity from these early roots up to the
        most recent advances.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                       Week of November 23 - 27

Monday, November 23

12:30 APPLIED MATHEMATICS SEMINAR  - Room 400 MSC
      Daria Filippova, Mathematics and Statistics, BGSU 
      "Perron's method for proof of existence of solutions of
       the Dirichlet problem in arbitrary domains"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Karl Grosse-Erdmann, Fernuniversitat Hagen/Ohio University
      "Chaos out of order -- why the exponential function makes
       differentiation chaotic"      

Wednesday, November 25

No seminars or classes scheduled.

Happy Thanksgiving!


Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                    Week of November 30 - December 4 

Monday, November 30

12:30 APPLIED MATHEMATICS SEMINAR  - Room 400 MSC

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Mihaela Marcusanu, Mathematics and Statistics, BGSU 
      "Universal primitives"

Tuesday, December 1

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Lattice-ordered groups: hyper-archimedean l-groups"

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Leech lattice and Conway groups"

Wednesday, December 2

 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Lisa Cocchi and Diane Conway, Applied Statistics 
        and Operations Research, BGSU

Thursday, December 3

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "The Leech lattice and Conway groups"

Friday, December 4

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Edsel Pena, Mathematics and Statistics, BGSU 
      "Time-to-event analysis"
      Abstract: In many studies in the natural and social sciences, in
        biomedical settings, and in engineering/reliability
        situations, the characteristic or variable of interest is the
        time to the occurrence of an event of interest.  Examples of
        such events are death or relapse of patients in biomedical
        studies, breakdown of a marriage in a sociological setting,
        failure of a mechanical/electronic component, first mating of
        organisms in an ecological study, committing a criminal
        offense by a delinquent, acceptance of a manuscript for
        publication, an error in a Tom Wolfe novel, insurance claim in
        an actuarial setting, occurrence of an earthquake in a
        geological investigation, and many others. A statistical
        problem in such situations is to estimate nonparametrically
        the unknown distribution function of the time to occurrence of
        the event on the basis of a possibly incomplete data.

        In this talk, starting from basic probability principles, the
        main ideas behind the modern stochastic process approach to
        the analysis of such time-to-event data will be
        discussed. This modern framework will then be applied to the
        nonparametric estimation of the distribution function of the
        interoccurrence times of events when the event of interest is
        of a recurring type.  This will be illustrated using data from
        a gastroenterology study.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of December 7 - 11

Monday, December 7

12:30 APPLIED MATHEMATICS SEMINAR  - Room 400 MSC
      Bernie Elec, Mathematics and Statistics, BGSU 

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Neal Carothers, Mathematics and Statistics, BGSU 
      "Gliding humps and sliding bumps"
      Abstract: We give two prototypical examples of the so-called
        gliding hump argument.  The first is quite elementary while
        the second is largely elementary.

 7:30 MATH CLUB TALK  - Room 222 MSC
      Paul Boisen, National Security Agency
      "Let's solve some cipher!"
      Abstract:
        WEOET NAEFG NSORA TNAHI ERLRU RSEEG
        RSASR SEDOC HOIER LRFLR ENEAL ARNSS
        PMOLH BSYAI IRFSM NCCVN TRLTD OITDA
        EURPA SNFEE DIPOI HFTPE TESDL HPAUO
        EEDOH FETMI TTRMT FEEAD BTTIH NSRIR
        DEEAS TUDHO TXOSF TJMTC OWELV ISSUM
        TIOEE TIDHE EYORS ISXOE AOIIO OEABR
        NOLUE CPTOU UEYOM ETIET TTNET NDEBU
        QONNS NUONI OEETR FIEIT ERCSS TNCTO

        5 characters per group times 54 groups = 270 characters

      Dr. Boisen will be available to meet with faculty and students
      earlier in the day, in Room 447.  Contact Curt Bennett for more
      details.

Tuesday, December 8

10:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Archimedean extensions of rings of continuous functions"

 3:30 FACULTY MEETING  - Room 459 MSC
      Discussion of the Unit Plan.

Wednesday, December 9

 2:30 STATISTICS SEMINAR  - Room 459 MSC
      Lisa Cocchi and Diane Conway, Applied Statistics 
        and Operations Research, BGSU
      "The benefits and necessities of randomization, an activity-based 
       presentation"

Thursday, December 10

12:30 OFFICE PARTY  - Room 459 MSC

 3:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett, Mathematics and Statistics, BGSU 
      "The MOG"

Friday, December 11

 Last day of classes.  No colloquium.

 6:00 DEPARTMENT HOLIDAY FAMILY POTLUCK
      Social Room, First Presbyterian Church, 126 S. Church St.,
      next to the Junior High School, Wooster St., one block west of Main St.
      
      For faculty, graduate students, and their families or significant
      others.  Sign up in the department office, telling what dish you
      will bring and how many people.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of January 11 - 15

Tuesday, January 12

 3:30 FACULTY MEETING  - Room 459 MSC
      Meeting with candidates for department chair


Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of January 18 - 22

Monday, January 18

 Martin Luther King, Jr. Day - no classes

Tuesday, January 19

 3:30 FACULTY MEETING  - Room 459 MSC
      Discussion of program review document.

Wednesday, January 20

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Open special cases of the distance transitive graphs problem"

 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Algebraic properties of rings of continuous functions"

 3:30 STATISTICS SEMINAR  - Room 238 MSC *** Note room ***
      Jim Albert, Mathematics and Statistics, BGSU 
      "Ordinal modeling using latent variables"

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of January 25 - 29

Monday, January 25

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Open special cases of the distance transitive graphs problem"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Mihaela Marcusanu, Mathematics and Statistics, BGSU 
      "Universal measurable functions"

Wednesday, January 27

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Open special cases of the distance transitive graphs problem"

 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Algebraic properties of rings of continuous functions"

 3:30 STATISTICS SEMINAR  - Room 238 MSC *** Note room ***
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      "Environmental and ecological statistics"
  *** First talk of the semester ***

 7:00 ACTUARIAL SCIENCE SOCIETY  - Room 459 MSC
      Towers Perrin Actuarial Consulting Firm, Chicago
      Discussion of the company's line of business
      All are invited and refreshments and food will be available.

Thursday, January 28

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      Jim Albert, Mathematics and Statistics, BGSU 
      "Ordinal modeling using latent variables"

Friday, January 29

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Regents Professor Ernest E. Shult, Kansas State University
      "Remarks on the classification of polar spaces"
      Abstract: The general semilinear groups act as the full groups
        of symmetries of the classical projective spaces.  Projective
        spaces of rank at least three or more are all characterized by
        the famous Veblen-Young axioms.  All other classical groups
        are the groups of symmetries of polar spaces.  The polar
        spaces of rank at least three are characterized by axioms even
        simpler than the Veblen-Young axioms.  This fact is a
        culmination of work which began in the 1940's and has been
        enlarged and revised several times since.  For polar spaces of
        rank at least four, there is a teachable account of this
        classification, which is pieced together from the work of many
        authors.  I hope to give an overview of this classification as
        currently revised, correcting along the way some errors that
        have been insinuated into revisions appearing in the in the
        current literature.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                         Week of February 1 - 5

Monday, February 1

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett, Mathematics and Statistics, BGSU 
      "Open special cases of the distance transitive graphs problem"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Ron Taylor, Mathematics and Statistics, BGSU 
      "Some results on super-cyclicity in the operator algebra of a
       separable Banach space"

Tuesday, February 2

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Candidate for position in Statistics
      "Some recent developments in bioequivalence"
      Abstract: The hypotheses of recently proposed bioequivalences
        (FDA, 1997) involve several parameters, such as the mean and
        variance of two populations: the generic drug and the brand
        name drug. These hypothesis spaces may be complicated regions
        in a plane or even in a 3-dimensional space. How can we
        construct tests involving these kinds of hypothesis regions
        when the data are normally distributed? In this talk, a
        reparametrization is introduced, a general class of
        hypotheses, which includes the proposed bioequivalences, is
        discussed and the exact alpha-level tests are proposed. When
        there is interaction between formulation and subject, a
        two-by-three crossover design is sufficient to assess
        individual bioequivalence, while a two-by-two crossover design
        should be used for population bioequivalence.

Wednesday, February 3

11:30 FACULTY MEETING  - Room 459 MSC
      Meeting with candidates for department chair

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett, Mathematics and Statistics, BGSU 
      "Open special cases of the distance transitive graphs problem"

 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Algebraic properties of rings of continuous functions"

 3:30 STATISTICS SEMINAR  - Room 304 MSC **** Note new room ****
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      "Environmental and ecological statistics"

Thursday, February 4

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      Jim Albert, Mathematics and Statistics, BGSU 
      "Bayesian model comparison"

Friday, February 5

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Candidate for a position in Applied Mathematics
      "Long-time error estimation and a stability indicator
       for the numerical solutions of initial value problems"
      Abstract: Traditional error estimation of initial value problems
        is based on the concept of numerical stability. For nonlinear
        problems and multi-physics systems discretized with various
        numerical techniques, it is difficult, if not impossible, to
        carry out stability analyses for the schemes. In many cases,
        computations are performed without error estimation.

        Our approach is more or less new in five aspects: 1, exact
        error propagation; 2, moving attractor; 3, two level error
        propagation analysis; 4, smoothing assumption; 5, stability
        indicator. With these, we prove a uniform bound (t>0) for the
        error between a numerical solution and a moving attractor.
        Because we do not base our analysis on any model problem or
        specific numerical scheme, the result can be used for many
        strongly nonlinear systems and arbitrary numerical methods.

        Currently, we consider only temporal discretization error, so
        we phrase the theory in terms of ODEs (including semi-
        discrete PDEs). In the future, the approach will be used to
        different types of PDEs.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                        Week of February 8 - 12

Monday, February 8

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Candidate for position in Statistics 
      "Analysis of multivariate spatial data using a latent variable model"

Tuesday, February 9

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Candidate for position in Applied Mathematics
      "Boundary integral computations of electromagnetic scattering in
       photonic crystal structures"

Wednesday, February 10

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett, Mathematics and Statistics, BGSU 
      "Open special cases of the distance transitive graphs problem"

 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Algebraic properties of rings of continuous functions"

 3:30 STATISTICS SEMINAR  - Room 304 MSC **** Note room ****
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      "Environmental and ecological statistics"

Thursday, February 11

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Candidate for position in Algebra
      "Finite simple subgroups of simple algebraic groups"

Friday, February 12

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Candidate for a position in Statistics
      "Simultaneous multiple comparisons using more than one control"

Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                         Week of March 1 - 5

Monday, March 1

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett, Mathematics and Statistics, BGSU 
      "Orthogonal and symplectic groups and geometries"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC

***** Seminar canceled, rescheduled for Monday, March 15 *****

      Gordon Wade, Mathematics and Statistics, BGSU
      "An abstract Poincare inequality"

Wednesday, March 3

 External reviewers visit the department today.

 10:00 Reviewers meet with graduate students  - MSC 400
 11:00 Reviewers meet with undergraduate non-majors  - MSC 400
 11:20 Reviewers meet with undergraduate majors  - MSC 400

 11:30 Applied Statistics and Operations Research interview talk
       Business Administration Building, Room 4000
       Candidate for a tenure-track position
       "Improving simulation models with constant and random
        imputs via sensitivity analysis (Cost-effective
        sensitivity analysis)"

 Noon  Reviewers have lunch with faculty group

 1:30-5:00 Office visits by reviewers to individual faculty and staff.
           Faculty will be in offices except during teaching periods.

 1:30 Algebra faculty meet with Phillips  - MSC 400

 2:30 Statistics/Probability faculty meet with S. Gupta  - MSC 400

 2:30 Analysis and Applied Math. faculty meet with Gorkin  - MSC 447

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett, Mathematics and Statistics, BGSU 
      "Orthogonal and symplectic groups and geometries"

 3:30 Math. education faculty meet with Gorkin and Phillips  - MSC 400

 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Algebraic properties of rings of continuous functions"

 3:30 STATISTICS SEMINAR  - Room 304 MSC **** Note room ****
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      "Hierarchical Markov transition matrix models and their
       applications to landscape ecology for watershed
       assessment with emphasis on relevant results in 
       mathematical stochastics, matrix algebra, and
       mathematical statistics"

 6:00 Reviewers have dinner with faculty group

Thursday, March 4

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      "Hierarchical Markov transition matrix models and their
       applications to landscape ecology for watershed
       assessment with emphasis on relevant results in 
       mathematical stochastics, matrix algebra, and
       mathematical statistics (continued)"

Friday, March 5

 2:30 Applied Statistics and Operations Research interview talk
      Business Administration Building, Room 4000
      Candidate for a tenure-track position
      "Multivariate nonparametric control charts using small samples"

 No department colloquium today.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                         Week of March 15 - 19

Monday, March 15

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Curt Bennett, Mathematics and Statistics, BGSU 
      "Orthogonal and symplectic groups and geometries"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Gordon Wade, Mathematics and Statistics, BGSU
      "An abstract Poincare inequality"

Tuesday, March 16

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      Hanfeng Chen, Mathematics and Statistics, BGSU 
      "Nonregular models"
      Abstract: Standard statistical procedures often require that the
        set-up model satisfy some regularity conditions. I will
        discuss the consequences and difficulties in statistical
        inference when these regularity conditions are not satisfied.

Wednesday, March 17

 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      Warren McGovern, Mathematics and Statistics, BGSU 
      "Algebraic properties of rings of continuous functions"

 3:30 STATISTICS SEMINAR  - Room 304 MSC **** Note room ****
      G. P. Patil, Distinguished Lukacs Professor, BGSU, and
      C. Taillie, Senior Research Associate, Center for Statistical
        Ecology and Environmental Statistics, Department of
        Statistics, Penn State
      "Statistical issues and approaches for multiscale modeling and
       assessment of landscapes based on single-resolution thematic
       raster maps"

      Abstract: Landscape pattern as represented in a thematic raster
        map is the joint result of two ingredients: (i) the marginal
        landcover distribution and (ii) the spatial arrangement of the
        landcover categories across the pixels.  Although the
        landcover distribution has no explicit spatial content, it
        nonetheless affects the apparent spatial pattern as perceived
        by a human studying the map or as measured by most landscape
        metrics.  To separate the perceptual from the "real" spatial
        pattern, landscape models should explicitly include the
        marginal landcover distribution as one set of parameters with
        additional parameters to regulate and summarize the "real"
        spatial pattern.  Vanishing of these additional parameters
        then signifies an absence of spatial pattern, i.e., a random
        assignment of landcover categories to pixels subject to the
        given marginal landcover distribution.

        One such parametric family of landscape models employs a
        hierarchical sequence of Markov transition matrices to
        generate the raster maps at successively finer resolutions
        until the resolution of the data map is reached.  Fitting of
        the model is based on linking the hierarchical transitions in
        the model to spatial transitions across the data map.  The
        fitting of this model for the last transition matrix has been
        discussed in the earlier seminar.  It is briefly reviewed to
        establish notation.  We then show how transition matrices at
        earlier hierarchical levels can be estimated using spatial
        transition matrices at broader spatial scales in the data map.
        Self-similarity of the hierarchical model (i.e., constancy of
        the transition matrices) is characterized in terms of the
        spatial adjacency matrices and a graphical test of
        self-similarity is described.

        We then study the eigen-decomposition of the transition
        matrices, with a view toward using the eigenvectors and
        eigenvalues for landscape characterization.  Eigenvectors are
        interpreted in terms of the spatial persistence of
        perturbations to the stationary distribution.  Ordered
        eigenvalues can be plotted against rank order and roughly
        indicate a fitted model's placement in a spectrum of spatial
        pattern ranging from "no pattern" to "very patchy" or "highly
        segregated."  For the 102 watersheds of Pennsylvania, the
        eigenvalue plots are nearly straight lines and cover a small
        portion of parameter space.  This suggests the desirability of
        more parsimonious modeling of the transition matrices.

        We accordingly describe several parametric subfamilies of
        transition matrices using the notion of diagonal dominance as
        guiding principle.  Diagonal dominance determines the degree
        to which daughters are like their mothers or, in the spatial
        domain, pixels are like their neighbors.  One model, in
        particular, involves parameters p, q, and c, where p is the
        marginal landcover distribution, c is a scalar parameter that
        is an inverse measure of diagonal dominance, and q is a
        probability vector that determines the landcover category of
        daughter pixels conditional on the daughter being different
        from the mother.  The square of the parameter (1-c) is found
        to be strongly correlated with the Kullback-Liebler distance
        between the actual model and the model with the same marginal
        p but with no spatial structure, and becomes a measure of
        spatial complexity for the model.  Upper and lower bounds are
        obtained for the eigenvalues of this pqc model.  These bounds
        show that when q is related to p in an appropriate way, the
        eigenvalue plots for the model are similar to those observed
        for the 102 watersheds of Pennsylvania.

        The spatial data matrices have more degrees of freedom than
        the submodels so the eigen-decomposition (which gives a
        perfect fit) cannot be used for fitting.  Instead we minimize
        some criterion function measuring the distance between
        observed and expected frequencies, such as chi-square.
        However, due to the spatial dependence, the criterion function
        cannot be benchmarked against the chi-square distribution for
        goodness-of-fit tests.  Goodness-of-fit for landscape models
        is a major open problem.

Thursday, March 18

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      G. P. Patil, Distinguished Lukacs Professor, BGSU, and
      C. Taillie, Senior Research Associate, Center for Statistical
        Ecology and Environmental Statistics, Department of
        Statistics, Penn State
      "Statistical issues and approaches for multiscale modeling and
       assessment of landscapes based on single-resolution thematic
       raster maps"
      Abstract:  See above.

Friday, March 19

 3:30 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Barbara Moses and Waldemar Weber, Mathematics and Statistics, BGSU 
      "The Seven-Eleven Problem"
      Abstract: A customer purchased four items at a Seven-Eleven Store.
        At first, the clerk multiplied their prices together and charged
        $7.11, but the customer protested, saying that the prices should
        have been added instead.  What was the cost of each item, if the
        price remained unchanged after making this correction?

        While solving this problem and thereby answering this question, we
        will have an opportunity to review general problem-solving
        heuristics and to utilize popular symbol-manipulation software for
        narrowing large search-spaces through a vigorous combination of
        theory and practice.  Hopefully, some appropriate representations
        of symmetric functions as well as interesting comparisons of
        additive and multiplicative operations will be obtained along the
        way.  Indeed, as we are careful to observe in our Summer Workshop
        on Problem Solving (Math 470/586), "since problem solving depends
        upon a theoretical contribution, it does more than answer getting."
        This workshop, offered July 25 to August 1, not only considers the
        educational uses of problems, but also explores effective ways to
        approach a general variety of them.  Though most of the workshop
        illustrations are drawn from precalculus mathematics, the
        particular solution for the present example also requires some
        differential calculus.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                         Week of March 22 - 26

Monday, March 22

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Orthogonal and symplectic groups and geometries"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Neal Carothers, Mathematics and Statistics, BGSU
      "The work of William Timothy Gowers, 1998 Fields Medalist"
      Abstract: William Timothy Gowers was awarded the 1998 Fields
        Medal for his work in Banach space theory, number theory, and
        combinatorics.  We will briefly survey Gowers's work in Banach
        space theory and, perhaps just as important, the work of those
        who came before.  The talk will be as non-technical as I can
        manage (given the subject): No proofs, but plenty of jargon!

Tuesday, March 23

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      Hanfeng Chen, Mathematics and Statistics, BGSU 
      "Nonregular models"
      Abstract: Standard statistical procedures often require that the
        set-up model satisfy some regularity conditions. I will
        discuss the consequences and difficulties in statistical
        inference when these regularity conditions are not satisfied.

Friday, March 26

 Spring meeting of the Ohio Section of the Mathematical Association of
 America, in Dayton, March 26-27.

 No colloquium this week.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                       Week of March 29 - April 2

Monday, March 29

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Orthogonal and symplectic groups and geometries"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Neal Carothers, Mathematics and Statistics, BGSU
      "The work of William Timothy Gowers, 1998 Fields Medalist, continued"

Tuesday, March 30

 3:30 FACULTY MEETING  - Room 459 MSC
      Annual evaluation procedures 

Wednesday, March 31

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU
      "Orthogonal and symplectic groups and geometries"
                                                             
 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      A. A. Ivanov, BGSU and Imperial College, London
      "Y-groups"
      
Thursday, April 1

 3:15 Coffee
 3:45 COLLOQUIUM  - Room 459 MSC
      Kanti Mardia, University of Leeds, England
      "Statistical shape analysis and its applications"
      Abstract: Objects are everywhere - natural and man-made.  With
        advances in technology, images in 2-D and 3-D provide easily
        accessible information on objects, especially their shapes.
        The field of shape analysis gives methods for the study of the
        shape of the objects where location, rotation and scale
        information can be removed.  Assuming that a shape can be
        described by its landmarks, there have been significant
        statistical advances in this decade.  It is in contrast with
        the historical work started in early 1900 by Karl Pearson
        where the measurements were mostly distances, measured by
        using callipers.

        Some statistical aspects of the field have been summarized in
        the recent book on this topic: Dryden and Mardia (1998) Wiley.
        We will describe the latest advances in statistical
        methodology to measure, describe and compare the shape of
        objects.  To make this material generally accessible, we start
        from the analysis of triangles using Bookstein coordinates and
        then proceed to describe Kendall's coordinates Procrustes
        methods, tangent approximations, symmetry in shapes, growth
        data, image warping, averaging and object recognition.  Shapes
        and Direction both live in non-Euclidean spaces, and therefore
        it is not surprising that these two areas share similar types
        of strategies in theory and practice.  However, shape space is
        more complex than directions.

        Practical examples will be given from various fields including
        medical imaging, face analysis and biology.  Open problems in
        the field will be also highlighted.
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                          Week of April 5 - 9

Monday, April 5

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Orthogonal and symplectic groups and geometries"

 3:30 ANALYSIS SEMINAR  - Room 459 MSC
      Rebecca Sanders, Mathematics and Statistics, BGSU 
      "Salas' results on hypercyclic bilateral shifts"

Tuesday, April 6

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      Gabor Szekely, Mathematics and Statistics, BGSU 
      "A unified approach for some non-parametric tests"

Wednesday, April 7

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU
      "Orthogonal and symplectic groups and geometries"
                                                             
 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      To be announced; check the department's web page.

 3:30 STATISTICS SEMINAR  - Room 304 MSC **** Note room ****
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      C. Taillie, Senior Research Associate 
      Senin Banga, Graduate Research Assistant 
      Center for Statistical Ecology and Environmental Statistics,
      Department of Statistics, Penn State University
      "Statistical issues related to the implementation of benchmark
       dose method"
      Abstract: The seminar(s) will discuss the following and related
        problems of mathematical and computational statistics:

        Develop likelihood-based procedures for calculating
        confidence limits on risk function and effective dose
        (benchmark dose, BMD) for continuous responses with emphasis
        on skew (nonnormal) distributed responses. Assess the
        sensitivity to model mis-specification.  Examine the
        statistical validity of BMD-determination by inversion of an
        upper confidence curve on the risk function.
  
        A benchmark dose (BMD) for continuous responses may be defined
        as a lower confidence limit on the effective dose
        corresponding to a specified risk level r. However,
        calculating such a confidence limit is not straightforward.
        By contrast, it is technically easier to obtain confidence
        limits on the risk function R(d).  One approach that has been
        suggested for BMD-determination is to first obtain a pointwise
        upper confidence curve U(d) on the risk function and then to
        invert this relationship by solving the equation U(d)=r.  The
        solution d is purported to be the desired BMD, i.e., a lower
        confidence limit on the effective dose corresponding to the
        risk level r.

      Background: The current approach to risk assessment for toxic
        noncarcinogenic chemicals is based on the assumption that
        there exists a threshold below which no adverse noncancer
        health effects are expected under lifetime exposure.  Various
        regulatory agencies estimate a ``safe'' exposure by first
        determining an exposure level which has been shown to cause no
        adverse effect in animals or humans and then apply
        ``uncertainty'' factors to account for missing information.

        Problems were identified with this methodology shortly after
        it was adopted some 30 years ago.  The risk assessment
        community has been searching for improved methods since that
        time.  One suggestion that has received a great deal of
        attention is to base the methodology on dose-response
        modeling.  The idea is to estimate the effective dose (ED)
        that causes some critical effect in a specified percentage of
        the test animals (e.g., $ED_{05}$ or $ED_{10}$) and then to
        designate the lower confidence limit for the effective dose as
        the ``benchmark dose.''  This benchmark dose may then be
        adjusted by uncertainty factors to arrive at the reference
        dose (RfD) or reference concentration (RfC).

        In spite of the fact that it is generally agreed that the
        benchmark dose method addresses many of the shortcomings of
        the current methodology, more than a decade has passed since
        the benchmark dose method was suggested as an alternative.
        One reason for this delay is that there are a number of
        difficult statistical issues remaining.  While the potential
        benefits have been recognized, risk assessors have been
        understandably reluctant to adopt a methodology which is not
        yet completely understood.

Thursday, April 8

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      "Statistical issues related to the implementation of benchmark
       dose method"
      Continuation of Wednesday's seminar; see above
      
Friday, April 9

 3:30 Refreshments
 3:45 Department of Mathematics and Statistics and
      Department of Applied Statistics and Operations Research
      JOINT COLLOQUIUM  - *** Room 116 Business Administration Building ***
      Dennis K. J. Lin, Pennsylvania State University
      "Designing computer experiments"
      Abstract: Computer models/simulations can describe complicated
        physical phenomena, such as performance characteristics of
        integrated circuits.  However, to use these models for
        scientific investigation, their generally running times and
        mostly deterministic nature require a special designed
        experiments.  Standard factorial designs are inadequate; in
        the absence of one or more main effects, their replication
        cannot be used to estimate error but instead produces
        redundancy.  A number of alternative designs have been
        proposed, but many can be burdensome computationally.  This
        paper presents a new class of designs developed from the
        rotation of a factorial design.  These rotated factorial
        designs are very easy to construct and preserve many of the
        attractive properties of standard factorial designs: they have
        equally-spaced projections to univariate dimensions and
        uncorrelated regression effect estimates (orthogonality).
        They also rate comparably to maximin Latin hypercube designs
        by the minimum interpoint distance criterion used in the
        latter's construction.

      About the speaker: Dr. Dennis Lin is a Professor of Management
        Science and Statistics at the Penn State University.  His
        research interests are quality engineering, industrial
        statistics (design of experiment, reliability, statistical
        process control, quality assurance) and response surface.  He
        has published more than 50 papers in a wide variety of
        journals, including Technometrics, Journal of the Royal
        Statistical Society, Ser. C., Journal of Quality Technology,
        and IEEE Transactions on Reliability.  Currently, he serves as
        managing editor for Statistics Sinica; associate editor for
        The American Statistician and Journal of Quality Technology;
        and on the Applied Statistics Committee for the American
        Statistical Association.  Dr. Lin is an elected fellow of the
        American Statistical Association (ASA), an elected member of
        the International Statistical Institute (ISI), a senior member
        of the American Society for Quality (ASQ), a lifetime member
        of the International Chinese Statistical Association (ICSA), a
        fellow of the Royal Statistical Society, and has received the
        Most Outstanding Presentation Award from SPES and ASA.

 Midwest Group Theory Conference (tentative schedule)
   See http://www-math.bgsu.edu/~sergey/conference.html for more
   information.
 Room 117 Olscamp Hall

 10:30-11:20 Sasha Ivanov 
 11:30-12:20 Antonio Pasini 

 2:30-3:20 Ernie Shult 
 3:30-4:20 Mark Ronan 
 4:30-4:50 Valery Vermeulen 
 5:00-5:20 Richard Weiss 

Saturday, April 10

 10:00 Spring Swing 99
       Golf scramble organized by BGSU Actuarial Science Society and
         the History Society
       For more information contact Jeff Faber, Actuarial Science
         Society President at jfaber@bgnet.bgsu.edu or 372-1178

 Midwest Group Theory Conference (tentative schedule)
 Room 095 Overman

  9:30-10:20 Michael Aschbacher 
 10:30-11:20 Gernot Stroth 
 11:30-11:50 Alexander Stein 

 2:30-3:20 Ulrich Meierfrankenfeld 
 3:30-4:20 Ron Solomon 
Weekly Calendar

Weekly Calendar of Seminars, Talks, and Events

Department of Mathematics & Statistics
Bowling Green State University

Jump to Colloquium Announcement.
                         Week of April 12 - 16

Monday, April 12

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU 
      "Orthogonal and symplectic groups and geometries"

 3:30 Refreshments
 3:45 COLLOQUIUM  - Room 459 MSC
      ***** Note different day *****
      Nathan Feldman, Michigan State University
      "Pure subnormal operators have cyclic adjoints"
      Abstract: In this talk we shall discuss various classes of
        linear operators on Hilbert space, including normal and
        subnormal operators.  We shall be interested in the cyclic
        behavior of these operators and we shall discuss and answer an
        old problem about subnormal operators.  Several examples will
        also be given.

Tuesday, April 13

 4:00 STATISTICS SEMINAR  - Room 459 MSC
      Arthur Yeh, Applied Statistics and Operations Research, BGSU

Wednesday, April 14

 2:30 GROUPS AND GEOMETRIES SEMINAR  - Room 459 MSC
      Sergey Shpectorov, Mathematics and Statistics, BGSU
      "Orthogonal and symplectic groups and geometries"
                                                             
 3:30 ALGEBRA SEMINAR  - Room 459 MSC
      Cecile Huybrechts, Queen Mary College (University of London)
      "The flavor of diagram geometry"
        This talk is supposed to be very elementary, with many
        examples and nice pictures.

 3:30 STATISTICS SEMINAR  - Room 304 MSC **** Note room ****
      G. P. Patil, Distinguished Lukacs Professor, BGSU
      "Environmental sampling and observational economy with emphasis
       on encounter sampling, composite sampling, ranked set sampling,
       and adaptive cluster sampling"
      Abstract:  
      Encounter Sampling: Surveys for monitoring changes and trends in
        our environment and its resources involve some unusual
        conceptual and methodological issues pertaining to the
        observer, the observed, and the observational process.
        Problems that are not typical of current statistical theory
        and practice arise.  In statistical ecology and environmental
        statistics, the theory of weighted distributions provides a
        perceptive and unifying approach for the problems of model
        specification and data interpretation within the context of
        encounter sampling.  Appropriate statistical modeling
        approaches help accomplish unbiased inference in spite of the
        biased data and, at times, even provide a more informative and
        economic setup.

      Adaptive Sampling: Several ecological and environmental
        populations are spatially distributed in a clumped
        manner. They are not very efficiently sampled by conventional
        probability based sampling designs.  Adaptive sampling is
        therefore introduced as a multistage design in which only the
        initial sample is obtained using a conventional probability
        based procedure.  When the variable of interest for a sampling
        unit satisfies a given criterion, however, additional units in
        the neighborhood are selected in the next sampling stage.
        This procedure is repeated until no new units satisfy the
        criterion, or the conditions of a stopping rule are satisfied.

        With the recent growth of geographic information systems
        (GIS), spatial data coverages for landscapes are becoming
        universal.  Such information, obtained mainly from digitized
        maps and remotely sensed sources, may provide a powerful aid
        to adaptive cluster sampling for increasing the efficiency of
        sampling clustered populations from across a two-dimensional
        surface.
     
      Observational Economy: Sampling consists of selection,
        acquisition, and quantification of a part of the population.
        While selection and acquisition apply to physical sampling
        units of the population, quantification pertains only to the
        variable of interest, which is a particular characteristic of
        the sampling units.  A minimum requirement is that
        identification and acquisition of sampling units be
        inexpensive as compared with their quantification.

      Composite Samples: Composite sampling has its roots in what is
        known as group testing.  An early application of group testing
        was to estimate the prevalence of plant virus transmission by
        insects.  In this application, insect vectors were allowed to
        feed upon host plants, thus allowing the disease transmission
        rate to be estimated from the number of plants that
        subsequently become diseased.  In light of recent
        developments, composite sampling is increasingly becoming an
        acceptable practice for sampling soils, biota, and bulk
        materials.

        A recent breakthrough with composite samples may be worth
        mentioning.  The individual sample with the highest value,
        along with those individual samples comprising an upper
        percentile, can now be identified with minimal retesting.
        This ability is extremely important when "hot spots" need to
        be identified such as with soil monitoring at a hazardous
        waste site.

      Ranked Set Samples: Ranked set sampling is a little known method
        of sampling that allows the use of auxiliary information for
        improving upon the performance of simple random sampling.  The
        primary requirement is the ability to rank small sets of
        sampling units with respect to the variable of interest
        without actually measuring that variable.  Subjective
        judgment, prior experience, visual inspection, and concomitant
        variables are among the types of auxiliary information that
        may be used to achieve the ranking.  The method does not
        prescribe any specific form or structure for the auxiliary
        information and the method is accordingly quite robust.
        Errors in ranking are permitted, although the better the
        ranking, the better the performance of the method.

        Ranked set sampling (RSS), induces stratification of the whole
        population at the sample level, and provides a kind of double
        sampling estimator that is robust.

Friday, April 16

 3:15 Refreshments
 3:45 COLLOQUIUM  - Room 459 MSC
      Rod Little, University of Michigan
      "Multiple imputation for missing data in clinical trials"
      Abstract: Mu