2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97850We study the short time heat content asymptotics for spectral boundary conditions. The heat content coefficients are shown to be non-local and some preliminary results concerning the structure of the first few terms are given.10 pages, LaTeXMathematical PhysicsHigh Energy Physics - Theory58J50text