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Geometry and analysis of groups and manifolds

Property (T) and a-T-menability for Banach spaces

speaker: Cornelia Drutu (University of Oxford)

abstract: This talk will discuss various versions of fixed point properties, generalizing property (T), and of proper actions on Banach spaces, generalizing a-T-menability. In particular, I will describe a notion of spectrum providing an optimal way to measure ``the strength'' of the property (T) that an infinite group may have, and what can be said about this spectrum, in particular for hyperbolic groups. I will also describe weak versions of a-T-menability for (acylindrically) hyperbolic groups and for mapping class groups. This is on joint work with Ashot Minasyan and Mikael de la Salle, and with John Mackay.

timetable:
Mon 26 Jun, 10:30 - 11:30, Aula Dini
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