2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/161611We prove that the Sobolev norm for a 1-D periodic Schroedinger equation remain bounded under small resonant perturbations.Spectral TheoryMathematical Physics81xxBounded Sobolev Norms for Linear Schrödinger Equations Under Resonant Perturbationstext