2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/184295We prove strong ellipticity of chiral bag boundary conditions on even dimensional manifolds. From a knowledge of the heat kernel in an infinite cylinder, some basic properties of the zeta function are analyzed on cylindrical product manifolds of arbitrary even dimension.16 pages, LaTeX, References addedHigh Energy Physics - Theorytext