2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71158We study the topological dynamics of the action of the diagonal subgroup on quotients Gamma\PSL(2,R)*PSL(2,R), where Gamma is an irreducible lattice. Closed orbits are described and a set of points of dense orbit is explicitly given. Such properties are expressed using the Furstenberg boundary of the symmetric space H*H.18 pages, 2 figuresDynamical Systems54H20; 37C85; 37B05text