2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65465This article studies the behaviour under liaison of the deficiency modules of schemes that are not assumed to be Cohen-Macaulay. Our study uses in particular a generalization of Serre duality, and gives a satisfactory description of this behaviour in dimension at most three. On the way we show other properties of linked schemes.Commutative AlgebraAlgebraic Geometry13C40; 14M06; 13D45; 13D07text