2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/115262This paper studies the relationship between the sections and the Chern or Pontrjagin classes of a vector bundle by the theory of connection. Our results are natural generalizations of the Gauss-Bonnet Theorem.10 pagesDifferential Geometry53C05,55R25,57R20text