2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205270We consider a higher dimensional gravity theory with a negative kinetic energy scalar field and a cosmological constant. We find that the theory admits an exact cosmological solution for the scale factor of our universe. It has the feature that the universe undergoes a continuous transition from deceleration to acceleration at some finite time. This transition time can be interpreted as that of recent acceleration of our universe.4 pages, 2 figures; References addedGeneral Relativity and Quantum Cosmologytext