Mikhajlets, V. A. Distribution of eigenvalues of operators which are nearly self-adjoint. (English) Zbl 0481.47002 Funct. Anal. Appl. 15, 62-64 (1981). MSC: 47A10 47A12 PDF BibTeX XML Cite \textit{V. A. Mikhajlets}, Funct. Anal. Appl. 15, 62--64 (1981; Zbl 0481.47002) Full Text: DOI
Mikhajlets, V. A. Distribution of eigenvalues of operators close to self-adjoint ones. (Russian) Zbl 0459.47004 Funkts. Anal. Prilozh. 15, No. 1, 78-79 (1981). MSC: 47A10 47A12 PDF BibTeX XML Cite \textit{V. A. Mikhajlets}, Funkts. Anal. Prilozh. 15, No. 1, 78--79 (1981; Zbl 0459.47004)