2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/67042A Lefschetz formula is given that relates loops in a regular finite graph to traces of a certain representation. As an application the poles of the Ihara/Bass zeta function are expressed as dimensions of global section spaces of locally constant sheaves.LaTex, 35 pagesNumber Theorytext