Notwendige und hinreichende Bedingungen für die Diskretheit des Spektrums Sturm-Liouvillescher Operatoren
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Publication:5645982
DOI10.1007/BF01896434zbMath0236.47046MaRDI QIDQ5645982
Publication date: 1972
Published in: Acta Mathematica Academiae Scientiarum Hungaricae (Search for Journal in Brave)
Linear symmetric and selfadjoint operators (unbounded) (47B25) General theory of ordinary differential operators (47E05) Ordinary differential operators (34L99)
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