On angular localization of spectra of perturbed operators

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2 Scopus citations


Let A and A- be bounded operators in a Hilbert space. We consider the following problem: let the spectrum of A lie in some angular sector. In what sector the spectrum of A- lies if A and A- are \close"? Applications of the obtained results to integral operators are also discussed.

Original languageEnglish
Pages (from-to)197-204
Number of pages8
JournalExtracta mathematicae
Issue number2
StatePublished - 1 Jan 2020


  • Operators
  • angular location
  • integral operator
  • perturbations
  • spectrum

ASJC Scopus subject areas

  • Analysis
  • Algebra and Number Theory
  • Mathematics (miscellaneous)
  • Geometry and Topology


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