ON-LINE - Operator algebras seminar

Speaker: Federico Vigolo (Weizmann Institute of Science)

Title: From group actions to finite graphs and back

Abstract: In this talk I will discuss a simple discretization technique that can   be used to translate between dynamical properties of group actions and geometric properties of finite graphs. I will explain how to use it to construct families of expander graphs and I will also discuss some recent results concerning strongly ergodic actions. The latter nicely  illustrates how this tool provides insight into the study of dynamical systems.

Zoom link: https://ucph-ku.zoom.us/j/63882271072