Journal of Functional Analysis · 1984 · 16 citations · 2 references
Natural SciencesMathematicsPhysicsAlgebraHilbert Space FormalismLie AlgebrasLie GroupsOperator TheoryQuantum OperatorsSpectral TheoryOperator SpacesSelf-adjoint OperatorsUnitary Operators
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N. Aronszajn · Transactions of the American Mathematical Society · 1950 · 5.4K citations · Full text