Concepedia
Mathematische Zeitschrift · 1972 · 29 citations · 2 references
Natural SciencesProperty LawDynamical SystemsComplex AnalysisHarmonic AnalysisHilbert Space FormalismOperator TheorySpectral TheoryFredholm OperatorsFredholm TheoryPerturbation Theory Of Operators
2
Perturbation of closed operators and their adjoints
Tosio Kato · Commentarii Mathematici Helvetici · 1970 · 38 citations
Natural Sciences, Property Law, Temporary Anchorage Devices +9
Generalisations of Rellich's theorem on perturbation of (essentially) selfadjoint operators
Rainer W�st · Mathematische Zeitschrift · 1971 · 31 citations
Natural Sciences, Social Psychology, Dynamical Systems +9