## Student Working Seminar in Groups and Dynamics

**Date:** November 13, 2019

**Time:** 1:00PM - 2:00PM

**Location:** BLOC 628

**Speaker:** Diego MartÃnez

**Title:** *Quasidiagonality and relations to group theory*

**Abstract:** Given a C*-algebra A we say that it is quasidiagonal if there is a sequence of finite-dimensional almost representations that are almost isometric. Even though this seems to be a very C*-algebraic definition, it has proven useful in many other areas, such as geometric group thery, index theory and numerical analysis. In this introductory talk we'll discuss how quasidiagonality is related to those contexts, and the role quasidiagonality has had in the theory of operator algebras.