In Fall 2026, seminar will run Fridays from 2–3 p.m. in Evans 939. Talks are 50 minutes (starting at 2 Berkeley time = 2:10), and there will be ample time for questions afterwards.
Organized by Aaron Calderon, Srivatsav Kunnawalkam Elayavalli, and Amir Mohammadi.
September 4, 2026
Izhar Oppenheim (Ben-Gurion)
Title: Banach Fixed Point Properties of Universal Lattices
Abstract: Higher-rank universal lattices and Steinberg groups over Z[t_1,…,t_m] 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.
September 11, 2026
Claire Burrin (Zurich)
Title: TBD
Abstract: TBD
September 18, 2026
Tina Torkaman (UChicago)
Title: TBD
Abstract: TBD
September 25, 2026
TBD
October 2, 2026
Bram Petri (Jussieu)
Title: TBD
Abstract: TBD
October 9, 2026
TBD
October 16, 2026
TBD
October 23, 2026
TBD
October 30, 2026
TBD
November 6, 2026
TBD
November 13, 2026
Jenya Sapir (Binghamton)
Title: TBD
Abstract: TBD
November 20, 2026
Inga Valentiner-Branth (Ghent)
Title: TBD
Abstract: TBD
November 27, 2026
No seminar: Thanksgiving
December 4, 2026
Megan Roda (IAS)
Title: TBD
Abstract: TBD
December 11, 2026
TBD
Aaron Calderon 