2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34059We determine a cosmological model that include a positive acceleration of the Universe and a time decreasing fine structure constant. The present day deceleration parameter is estimated by us, according to our model and the available experimental data .Rejected by Physical Review D15. Date of receipt (about) 25 August 2001.New version send to Physics Letters AGeneral Relativity and Quantum Cosmologytext