2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74891Let f be a homeomorphism of the torus isotopic to the identity and suppose that there exists a periodic orbit with a non-zero rotation vector (p/q,r/q), then f has a topologically monotone periodic orbit with the same rotation vector.10 pages, 1 figureDynamical Systems37E30; 54H20text