2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/210630We prove that a Lebesgue measure-preserving linked-twist map defined in the plane is metrically isomorphic to a Bernoulli shift (and thus strongly mixing). This is the first such result for an explicitly defined linked-twist map on a manifold other than the two-torus. Our work builds on that of Wojtkowski who established an ergodic partition for this example using an invariant cone-field in the tangent space.13 pages, 8 figures, high quality figures on requestDynamical Systemstext