2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34057We find a static solution for the scale-factor in a Brans-Dicke generalized theory where the scalar field and the coupling constant vary with time. We find also that in the early Universe there may be amplification of gravitational waves.Submitted to Physics Letters A. Date of receipt 01 October 2001General Relativity and Quantum Cosmologytext