Cornelia Drutu

Understanding infinite groups via their actions on Banach spaces

This talk will discuss various versions of fixed point properties, generalizing property (T), and of proper actions on Banach spaces, generalizing a-T-menability, relevant in many areas (e.g. for the Baum-Connes conjectures, in combinatorics, for the study of expander graphs, in ergodic theory, etc.) I will describe some of these reformulations and their applications.

The talk is on joint work with John Mackay, and with Ashot Minasyan and Mikael de la Salle.