2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106208The homogenous ideals of curves in a double plane have been studied by Chiarli, Greco, Nagel. Completing this work we describe the equations of any curve that is contained in some quadric. As a consequence, we classify the Hartshorne-Rao modules of such curves.Algebraic GeometryCommutative Algebratext