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JOURNALS // Matematicheskie Zametki // Archive
Mat. Zametki, 1971 Volume 9, Issue 6, Pages 677–686 (Mi mzm7053)
The negative part of the spectrum of the operator $(-1)^m\Delta^mu+qu$

V. G. Mishin

M. V. Lomonosov Moscow State University

Abstract: Exact criteria are obtained for the presence or absence of a negative part of spectra of operators generated by the differential operator $l(u)=(-1)^m\Delta^mu+qu$

UDC: 517.9

Received: 26.11.1969


 English version: Mathematical Notes, 1971, 9:6, 393–398

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© Steklov Math. Inst. of RAS, 2025