2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202080The standard Friedmann universe embedded in a five dimensional and constant curvature bulk is examined without any a priori junction condition between the brane and the bulk. A geometrical explanation for the accelerated expansion of the universe is derived by using a minimum set of assumptions consistent with the brane-world program. It is shown that the extrinsic curvature of the brane can be associated to the dark energy which presumably drives the universe expansion.Revtex, 4 pagesAstrophysicsGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext