Operator Algebra seminar

Speaker:  Martin Finn-Sell (Vienna)

Title: Large girth families in coarse geometry and operator algebras

Abstract : In this talk I will survey the current state of the art concerning the metric and analytic properties associated with families of finite graphs with large girth, discussing in particular their role in the construction of counterexamples to the coarse Baum-Connes and Baum-Connes conjectures. I will report on some developments concerning the construction of finitely generated groups without property A and, if time permits, describe what is known concerning the Baum-Connes conjecture for these groups.