Journal of Functional Analysis · 1981 · 67 citations · 20 references
Natural SciencesElectrical EngineeringDynamical SystemsLie AlgebrasInfinitesimal GeneratorsOperator SemigroupsSelf-adjoint OperatorsSemigroup Theory
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Edward Nelson · Annals of Mathematics · 1959 · 723 citations
Schrödinger operators with singular potentials
Tosis Kato · Israel Journal of Mathematics · 1972 · 616 citations