2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/114954The solution of the dark energy problem in models without scalars is presented. It is shown that a late-time accelerating cosmology may be generated by an ideal fluid with some implicit equation of state.LaTeX file 2 pages, published in Izw.VUZov.Fizika v.49,n5(2006)p.91-92High Energy Physics - Theorytext