2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101217We study several aspects of the regular deformations of completely integrable systems. Namely, we prove the existence of a Hamiltonian normal form for these deformations and we show the necessary and sufficient conditions a perturbation has to satisfy in order for the perturbed Hamiltonian to be a first order deformation.minor typo errors fixed, bibliography updatedSymplectic Geometry53D05; 37J35; 70H08text