2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36381Klein-Gordon equation with minimal coupling in FRW-like spacetimes with compact but not necessarily isotropic neither homogeneous space sections. Beside exceptional cases, the kernel is invariant under continuous isometries.Latex file, 7 pages, Contribution to ERES98 held at Salamanca, SpainGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext