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.