A necessary and sufficient discreteness condition for the spectrum of a two term differential operator of higher order

DOI10.4171/ZAA/150zbMath0577.34017MaRDI QIDQ1065984

Erich Müller-Pfeiffer, St. Werler

Publication date: 1985

Published in: Zeitschrift für Analysis und ihre Anwendungen (Search for Journal in Brave)

zbMATH Keywords

weighted Hilbert spaceSelf-adjoint differential operators

Mathematics Subject Classification ID

General theory of ordinary differential operators (47E05) Ordinary differential operators (34L99)

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