2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228411We study non-invertible piecewise hyperbolic maps in the plane. The Hausdorff dimension of the attractor is calculated in terms of the Lyapunov exponents, provided that the map satisfies a transversality condition. Explicit examples of maps for which this condition holds are given.21 pages, 5 figuresDynamical Systems37D50, 37C45text