The conditions for the discreteness of the spectrum of self-adjoint differential operators of even order

DOI10.1360/012012-75zbMath1488.34469OpenAlexW2329238008MaRDI QIDQ5017846

Jianqing Suo, Wan Yi Wang

Publication date: 17 December 2021

Published in: SCIENTIA SINICA Mathematica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1360/012012-75

zbMATH Keywords

self-adjoint operatoressential spectrumdiscrete spectrum

Mathematics Subject Classification ID

General spectral theory of ordinary differential operators (34L05) Linear symmetric and selfadjoint operators (unbounded) (47B25) General theory of ordinary differential operators (47E05) Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators (34L15)

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