2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/109855We solve exactly the Regge-Wheeler equation for axial perturbations of the Schwarzschild metric in the black hole interior in terms of Heun functions and give a description of the spectrum and the eigenfunctions of the interior problem. The phenomenon of attraction and repulsion of the discrete eigenvalues of gravitational waves is discovered.12 pages, latex file, 5 figures, changes in the title, new section, new comments, new references and new acknowledgments addedGeneral Relativity and Quantum Cosmologytext