2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103890A class of piecewise affine hyperbolic maps on a bounded subset of the plane is considered. It is shown that if a map from this class is sufficiently area-expanding then almost surely this map has an absolutely continuous invariant measure.18 pages, 1 figureDynamical Systems37D50text