Group Actions and Dynamics Seminar: Banach Fixed Point Properties of Universal Lattices

Event details Date: Friday, September 4, 2026 Time: 2:00 PM to 3:00 PM Location: 939 Evans Hall Type: Lecture / Workshop About this event Speaker: Izhar Oppenheim, Ben Gurion University Higher-rank universal lattices and Steinberg groups over Z[t1,…,tm] can be viewed as generalizations of higher-rank algebraic lattices. In this lecture, I will discuss results showing that these groups possess the fixed point property for all affine isometric actions on uniformly convex Banach spaces. This result provides a far-reaching extension of my earlier work on Banach property (T) for SL(n,Z) that was later generalized by de Laat and de la Salle for all higher rank algebraic lattices. Official event details: https://events.berkeley.edu/math/event/327945-group-actions-and-dynamics-seminar-banach-fixed