2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/137422We prove a lower bound for the first eigenvalue of the Dirac operator on a compact Riemannian spin manifold depending on the scalar curvature as well as a chosen Codazzi tensor. The inequality generalizes the classical estimate from [2].8 pagesDifferential Geometry53C25; 53C27text