2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79338We show that the class of subspaces of c_0 is stable under Lipschitz isomorphisms. The main corollary is that any Banach space which is Lipschitz isomorphic to c_0 is linearly isomorphic to c_0.22 pagesFunctional Analysis46B03, 46B20text