2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/152727It is explained how techniques from microlocal analysis can be used to settle some long-standing questions that arise in the study of the interaction of quantum matter fields with a classical gravitational background field.7 pages, Latex, talk presented at the Conference on Partial Differential Equations, Potsdam 1996High Energy Physics - TheoryFunctional AnalysisApplication of Microlocal Analysis to the Theory of Quantum Fields Interacting with a Gravitational Fieldtext