HD-Combinatorics: Shmuel Weinberger, "L^2 cohomology"

Abstract: I will give an introduction to the cohomology of universal covers of finite complexes. These groups are (for infinite covers) either trivial or infinite dimensional, but they have renormalized real valued Betti numbers. Their study is philosophically related to the topic of our year, and they have wonderful applications in geometry, group theory, topology etc and I hope to explain some of this.

Date: 

Mon, 13/11/2017 - 14:00 to 16:00

Location: 

Room 130, Feldman Building, Givat Ram