On angular localization of spectra of perturbed operators

M. I. Gil ^[1]
1. [1] Ben-Gurion University of the Negev
  
  Ben-Gurion University of the Negev
  
  Israel
Localización: Extracta mathematicae, ISSN-e 0213-8743, Vol. 35, Nº 2, 2020, págs. 197-204
Idioma: inglés
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Resumen
- Let A and Ã 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 Ã lies if A and Ã are “close”? Applications of the obtained results to integral operators are also discussed.