Christian Rosendal : Finitely approximable groups and actions

Posted by Christian Rosendal , part of the Logic Seminar.

At

Feb. 9, 2010, 4 p.m.

In

SEO 612

Abstract

We give an introduction to the interactions between strong versions of residual finiteness for groups and finite approximability of actions. As an application, we shall show that the isometry group of the rational Urysohn metric space has ample commuting generics.