2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97443Let $P$ be an operator of Dirac type on a compact Riemannian manifold with smooth boundary. We impose spectral boundary conditions and study the asymptotics of the heat trace of the associated operator of Laplace type.20 pages, published in Geometric Aspects of Partial Differential Equations, Contemporary Mathematics 242 (1999) AMS, 107-124High Energy Physics - TheoryMathematical Physicstext