TETRAHEDRAL GEOMETRY/TOPOLOGY SEMINAR

         ANNOUNCEMENT

DATE:              Friday, December 1, 2006            

LOCATION:    Hempfield High School, Room 213 (directions attached)                        

                           followed by dinner at a place to be determined.

4:30 TALK:      John McCleary, Vassar College

                           “Borsuk-Ulam Theorems for the complement of arrangements”

The classical Borsuk-Ulam theorem provides conditions when an equivariant mapping of a certain sort fails to exist. Combinatorial problems are sometimes formulated by constructing a mapping from a configuration space to a test space with symmetries. If the mapping fails to exist, a coincidence occurs that solves the combinatorial problem. In this talk, I will show a rich source of this type of theorem where the test space is the complement of an arrangement.

     EVERYONE WELCOME

       PLEASE FORWARD THIS ANNOUNCEMENT TO ANYONE INTERESTED

           The Tetrahedral Geometry/Topology Seminar is sponsored jointly by

Elizabethtown College, Franklin & Marshall College, Lebanon Valley College and Millersville University.