Quebec Mathematical Sciences Colloquium

February 22, 2008 from 16:00 to 18:00 (Montreal/EST time) On location

Combinatorics as geometry

Colloquium presented by Fernando Rodriguez Villegas (University of Texas at Austin)

Ever since Weil we know that counting points of varieties over finite fields yields topological information about them. In this talk I will discuss several examples of this two-way street between combinatorics and geometry involving, in decreasing order of complexity: character varieties parameterizing representations of the fundamental group of a Riemann surface into GL_n, representations of quivers and counting graphs of various sorts.


UdeM, Pav. André-Aisenstadt, 2920, ch. de la Tour, room 6214