2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/157043In this paper we prove certain properties of cellular and acyclic classes of chain complexes of modules over a commutative Noetherian ring. In particular we show that if X is finite and belongs to some cellular class C then Σ^n H_X also belongs to C, for every n.16 pages, references added, corrected typosAlgebraic TopologyCommutative Algebra55U99; 18G99text