2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/227113We compute the infinitesimal deformations of two families of restricted simple Lie algebras: the contact and the Hamiltonian algebras.26 pages, final version, to appear on J. Pure and Applied AlgebraRings and Algebras17B50, 17B20, 17B56text