2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183796We study tensorial perturbations (gravitational waves) in a universe with particle production (OSC). The background of gravitational waves produces a perturbation in the redshift observed from distant sources. The modes for the perturbation in the redshift (induced redshift) are calculated in a universe with particle production.10 pages, 2 figuresGeneral Relativity and Quantum Cosmologytext