Wouter van Limbeek : Lueck's Approximation Theorem

Posted by Wouter Van Limbeek , part of the Graduate Groups and Dynamics Seminar.

At

Feb. 13, 2019, 4 p.m.

In

612 SEO

Abstract

Last time we introduced L^2 homology and their Betti numbers. This time we prove the main theorem connecting the classical and the L^2, namely Lueck's approximation theorem (realizing L^2 Betti numbers as an appropriate limit of ordinary Betti numbers along a tower of covers).