TETRAHEDRAL GEOMETRY/TOPOLOGY SEMINAR

         ANNOUNCEMENT

DATE:              Friday, October 5, 2007                

LOCATION:    Hempfield High School, Room 213 (directions at http://www.millersville.edu/~tgts/)                

                           followed by dinner at a place to be determined.

4:30 TALK:      Ron Umble, Millersville University

                           “Some Naturally Occurring Examples of A-infinity Bialgebras”

              ABSTRACT: (Joint work with A. Bersiano) Let p be an odd prime. When n > 3, each

                           tensor factor of form E \otimes Γ in the homology of K(Z,n) with Z_p coefficients is an

                           A-infinity bialgebra with non-trivial structure. We give explicit formulas for the structure

                           maps and the quadratic relations among them. Thus E \otimes Γ is a naturally occurring

                           example of an A-infinity bialgebra whose internal structure is well-understood.

     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.