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JOURNALS // Matematicheskie Zametki // Archive
Mat. Zametki, 1969 Volume 5, Issue 3, Pages 341–349 (Mi mzm6854)
This article is cited in 3 papers

On perturbations of the spectrum of unitary operators

N. K. Nikol'skii

Leningrad branch of V. A. Steklov Mathematical Institute of USSR Academy of Sciences

Abstract: We study the stability of the essential spectrum of unitary operators under nuclear and compact perturbations.

UDC: 513.88

Received: 01.03.1968


 English version: Mathematical Notes, 1969, 5:3, 207–211

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