2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35817We consider discontinuous signature change with the weak junction condition favoured by Ellis et. al. (1992). We impose certain regularity conditions and investigate the space of solutions (considered as one-parameter families of three-dimensional Riemannian manifolds) for dust and scalar field models.13 pages, Latex2e, amstex, a4wide, theoremGeneral Relativity and Quantum Cosmologytext