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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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