2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35146We show that the gravitational collapse of a black-hole terminates in the birth of a white-hole, due to repulsive gravitation (antigravitation); in particular, the infinite energy density singularity does NOT occur.3 pages including front page.Replaced version consists of a slightly reworded textGeneral Relativity and Quantum Cosmologytext