2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146616Let (R, m) be a local commutative ring. Suppose that m is principal and that m^2 = 0. We give a complete description of the cellular lattice of perfect chain complexes of modules over this ring.6 pagesAlgebraic TopologyCommutative Algebra57N60; 13D99text