ON-LINE - Operator algebras seminar
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