2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/6832The idea here is to set the cosmical constant $λ$ proportional to the scalar of the stress-energy tensor of the ordinary matter. We investigate the evolution of the scale factor in a cosmological model in which the cosmological constant is proportional to the scalar of the stress-energy tensor.10 pagesAstrophysicsCosmological model with $Ω_M$-dependent cosmological constanttext