2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142802The full relativity of the concepts of motion and rest, which is characteristic of the Einsteinian general relativity (GR), does not allow the generation of physical gravitational waves (GW's). -- The undulatory nature of a metric tensor is not an invariant property, but depends on the coordinate frame. -- An undulation of a metric tensor is propagated with a speed that can have any value between zero and infinite.5 pages, LaTeXGeneral Physicstext