2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205980It has been suggested that re-expressing relativity in terms of forces could provide fresh insights. The formalism developed for this purpose only applied to static, or conformally static, space-times. Here we extend it to arbitrary space-times. It is hoped that this formalism may lead to a workable definition of mass and energy in relativity.16 pagesGeneral Relativity and Quantum Cosmologytext