MS Seminar (Mathematics - String Theory)

Speaker: Yuri Prokhorov (Moscow State University)
Title: Subgroups of Cremona groups I
Date: Wed, Feb 08, 2012, 13:15 - 14:45
Place: Seminar Room A
Abstract: Cremona group is the group of automorphisms of the rational function field C(t_1,t_2,..., t_n). In this lecture I describe the method that allow to find finite subgroups of the Cremona group. I introduce minimal models (G-Fano-Mori models) and outline the classification in dimension 2. Relation to the notion of essential dimension of groups will also discussed.