Semigroup Forum · 1994 · 36 citations · 8 references
Natural SciencesMathematicsDynamical SystemsTopologyContinuous Dynamical SystemsFunctional AnalysisHyperbolic DynamicsOperator TheoryPartial Differential EquationsHyperbolic AttractorsOperator SemigroupsParabolic Partial Differential EquationsSemigroup Theory
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J. R. Retherford · Bulletin of the American Mathematical Society · 1978 · 657 citations · Full text
Stationary scattering theory for time-dependent Hamiltonians
James S. Howland · Mathematische Annalen · 1974 · 326 citations