Diminishing of the spectrum of an operator under extension

DOI10.1007/BF01097575zbMath0714.47005OpenAlexW2060642541MaRDI QIDQ750845

Mikhail I. Ostrovskii

Publication date: 1990

Published in: Journal of Soviet Mathematics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf01097575

zbMATH Keywords

isometric extensionnonempty nonessential spectrum

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) Dilations, extensions, compressions of linear operators (47A20)

This page was built for publication: Diminishing of the spectrum of an operator under extension