[Binghamton Geometry/Topology Seminar] February 5

[Marco Varisco]

BINGHAMTON GEOMETRY/TOPOLOGY SEMINAR
  http://www.math.binghamton.edu/dept/topsem/

Date:  Thursday, February 5, 2009

Time:  2:50 pm

Place:  Library North 2205
  (followed by coffee/tea in the Anderson Reading Room)

Speaker:  Tara Holm (Cornell University)

Title:  Divided difference operators in equivariant cohomology

Abstract:  Newton introduced divided differences to define
interpolation polynomials fitting data points. More recently, Demazure
and Bernstein-Gelfand-Gelfand have used divided difference operators
when studying the cohomology of flag varieties. These operators may be
defined more generally on Borel's equivariant cohomology. I shall
begin with a brief introduction to equivariant cohomology, discuss the
construction of the divided difference operators, and show how they
can be used computationally. This talk is based on joint work with
Reyer Sjamaar.