2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/104948A concrete description of all graded maximal Cohen-Macaulay modules of rank one and two over the affine cone of the simple node (a non-isolated singularity) is given. For this purpose we construct an alghoritm that provides extensions of MCM modules over an arbitrary hypersurface.39 pagesCommutative AlgebraAlgebraic Geometry13C14, 13H10,14H60, 14H45text