2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/183828Using the Pöshl-Teller approximation, we evaluate the neutrino quasinormal modes (QNMs) of a Kerr-Newman-de Sitter black hole. The result shows that for a Kerr-Newman-de Sitter black hole, massless neutrino perturbation of large $Λ$, positive $m$ and small value of $n$ will decay slowly.25 pages, 13 figuresGeneral Relativity and Quantum Cosmologytext