2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/98114We give conditions for the exactness of Rokhlin endomorphisms, apply these to random walks on locally compact, second countable topological groups and obtain that the action on the Poisson boundary of an adapted random walk on such a group is weakly mixing.Dynamical SystemsProbability37A20; 37A15; (37A40; 60B15; 60J50)text