2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/226343In the literature on general relativity no mention is made of a remarkable result contained in Hilbert's memoir "Die Grundlagen der Physik", according to which in particular instances and in particular regions the Einsteinian gravity exerts a repulsive action. We give here a concise illustration of this peculiar phenomenon.7 pages, LaTeXGeneral Physicstext