2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/137712In this short note, we show that the negative curvature is preserved in the deformation of hyperbolic warped product metrics under Ricci flow. It is also showed that the flow converges to a flat metric as time going to infinity.9 pagesDifferential GeometryAnalysis of PDEs53Cxx, 35Jxxtext