Integral Equations and Operator Theory · 1984 · 107 citations · 18 references
Natural SciencesPhysicsRepresentation TheoryEigenvalue ProblemsHilbert Space FormalismLinear AlgebraMatrix ComputationOperator TheorySpectral TheoryOperator AlgebrasOperator SpacesToeplitz Operators
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N. Aronszajn · Transactions of the American Mathematical Society · 1950 · 5.4K citations · Full text
Lars Hörmander · Acta Mathematica · 1971 · 2.4K citations · Full text
The spectral function of an elliptic operator
Lars Hörmander · Acta Mathematica · 1968 · 873 citations · Full text
On Levi's Problem and the Imbedding of Real-Analytic Manifolds
Hans Grauert · Annals of Mathematics · 1958 · 624 citations