2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199371We show that the differential-geometric description of matter by differential structures of spacetime leads to a unifying model of the three types of energy in the cosmos: matter, dark matter and dark energy. Using this model we are able to calculate the ratio of dark energy to the total energy of the cosmos.7 pages, no figuresGeneral Relativity and Quantum Cosmologytext