2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/117592This paper has been withdrawn because the part concerning the definition of global hyperbolicity has already been included in an expanded and clearer way in gr-qc/0611138. The remainder will be also extended and posted.This paper has been withdrawn. The part concerning the definition of global hyperbolicity has already been included in an expanded and clearer way in gr-qc/0611138. The remainder will be also extended and postedGeneral Relativity and Quantum Cosmologytext