Activities This Week

This page list all events and seminars that take place in the department this week. Please use the form below to choose a different week or date range.

PRO (Presenting Results of Others) Seminar

Stationary random subgroups in negative curvature

Apr 16, 09:30—11:00, 2026, -101

Speaker

יאיר גלזנר (BGU)

Abstract

Preprint of Ilya Gekhtman and Arie Levit “Stationary random subgtroups in negative curvatire”.

BGU Probability and Ergodic Theory (PET) seminar

On The Simplicity of Reduced Crossed Products, and Stabilizers

Apr 16, 11:10—12:00, 2026, -101

Speaker

Yair Hartman (BGU)

Abstract

For a minimal action of a countable group G on a compact space X, we establish necessary conditions for the simplicity of the corresponding reduced crossed product C*-algebras in terms of stabilizer subgroups. In particular, our result gives a complete characterization of the simplicity of the reduced crossed product associated with minimal actions of linear groups, answering a question of Ozawa (2014) for these groups. Joint work with Mehrdad Kalantar

Other Dates