2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/120258In order to include nontrivial spatial topologies in the problem of quantum creation of a universe, it seems to be necessary to generalize the sum over compact, smooth 4-manifolds to a sum over finite-volume, compact 4-orbifolds. We consider in detail the case of a 4-spherical orbifold with a cone-point singularity. This allows for the inclusion of a nontrivial topology in the semiclassical path integral approach to quantum cosmology, in the context of a Robertson-Walker minisuperspace.Contribution to the XXVII National Meeting on the Physics of Particles and Fields (Aguas de Lindoia, Brazil, Sep. 2006). Revisions: Equation (10) corrected; First paragraph of Sec. 2 reworded; Ref. [12] modifiedGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext