Hokkaido Mathematical Journal · 1983 · 79 citations · 1 references
Natural SciencesMathematicsOpticsPropagationSet TheoryFourier OpticsOperator TheoryPartial Differential EquationsPhysical OpticsScattering ProblemsWave FunctionsAnalytical Wave SolutionsOperator DomainsWave FrontsWavefront DiffractionWavefront Model
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Pseudo-differential Operators and Non-elliptic Boundary Problems
Lars Hörmander · Annals of Mathematics · 1966 · 496 citations