2022 - T2 - WS2 - Self-similarity of groups, trees and fractals

Collection 2022 - T2 - WS2 - Self-similarity of groups, trees and fractals

Organizer(s) Erschler, Anna ; Leemann, Paul-Henry ; Nagnibeda, Tatiana ; Skipper, Rachel
Date(s) 30/05/2022 - 03/06/2022
linked URL https://indico.math.cnrs.fr/event/6576/
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Harmonic functions on linear groups

By Josh Frisch

The Poisson boundary of a group is a probabilistic object which serves a dual role. It represents the space of asymptotic trajectories a random walk might take and it represents the possible space of bounded harmonic functions on a group.

In this talk I will discuss the Poisson boundary for linear groups. In particular I will focus on the question of when the boundary is trivial in which case all bounded harmonic functions on the group are constant. This is joint work with Anna Erschler.

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