On Killing vector fields of a homogeneous and isotropic universe in closed model

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/136295Killing vector fields of a closed homogeneous and isotropic universe are studied. It is shown that in general case there is no time-like Killing vector fields in such a universe. Two exceptional cases are revealed.AmSTeX, 19 pages, amsppt styleDifferential GeometryMathematical Physics53B30, 81T20, 83F05, 85A40On Killing vector fields of a homogeneous and isotropic universe in closed modeltext