2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/36692An efficient approach to tensor perturbation calculations by proper use of computer algebra methods is described, reaching the sufficient generality required for a comprehensive analysis of the Schwarzschild and Reissner-Nordstroem metric stability.6 pages, 3 figuresGeneral Relativity and Quantum CosmologyDeriving the Regge-Wheeler and Zerilli equations in the general static spherically-symmetric case with Mathematica and MathTensortext