2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36313We consider a model of the Universe based on the equation of state $p=(1/3)ρ(c/F)^2$, where $F$ is the scale factor. This model behaves as an inflationary Universe from the beginning and during its early stages, and behaves as dust matter during the stages of maximum expansion.Latex, 13 pagesGeneral Relativity and Quantum Cosmologytext