Week of April 23 - 27, 2012


Monday, April 23, 2012

10:30 AM         Advisory Committee Meeting        400 MSC


Tuesday, April 24, 2012

2:30 PM          Algebra and Topology Seminar      459 MSC
                 Rieuwert Blok, BGSU
                 Coxeter Groups V

3:45 PM          Faculty Meeting                   459 MSC
                 Karen Weymouth, Senior Account Manager, McGraw-Hill
                 Higher Education, Science and Mathematics
                 ALEKS:  Math Emporium.   


Wednesday, April 25, 2012

1:30 PM          Math 1150 Meeting                 447 MSC

4:30 PM          Analysis Seminar                  459 MSC
                 Swarup Ghosh, BGSU

                 A Counterexample to the Peak Point Conjecture (Part
                 III)

                 In 1957, Andrew Gleason conjectured that for a function
                 algebra A on X, if every point in X is a peak point for
                 A, then A = C(X), known as peak point conjecture.
                 However, in 1968, in his Ph.D. dissertation, Brian Cole
                 constructed a counterexample to this conjecture. In
                 this talk, we will discuss Cole's counterexample and
                 related conjectures.


Thursday, April 26, 2012

11:00 AM         Math 1150 Meeting                 459 MSC

2:30 PM          Putnam Team Meeting               445 MSC


Friday, April 27, 2012 

3:30 PM          Refreshments                      459 MSC

3:45 PM          Colloquium                        459 MSC
                 Ozgur Martin, Miami University, OH
                 Weighted Shifts and Disjoint Hypercyclicity

                 A linear continuous operator T on a topological vector
                 space X is hypercyclic if there exists a vector f in X
                 such that the orbit {T^n(f): n > 0} is dense in X. The
                 first example of a hypercyclic operator on a Banach
                 space was given in 1969 by S. Rolewicz, who showed that
                 if B is the backward shift on the space of square
                 summable sequences, then zB is hypercyclic if and only
                 if |z| > 1. A natural generalization of these operators
                 are the weighted backward shifts. In 1995, H. Salas
                 characterized the hypercyclic weighted backward shifts
                 completely in terms of their weight sequences.

                 The aim of this talk is to extend the characterization
                 of Salas to the setting of disjointness introduced by
                 Bernal and, independently, by J. Bes and A. Peris. It
                 turns out that some well known results about a single
                 hypercyclic operator fail to hold true for disjoint
                 hypercyclic operators.

                 This is a joint work with J. Bes and R. Sanders.

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