Property (w) and perturbations

Pietro Aiena, Maria Teresa Biondi

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


A bounded linear operator T ∈ L(X) defined on a Banach space X satisfies property (w), a variant of Weyl’s theorem, if the complement in the approximate point spectrum σa(T ) of the Weyl essential approximate spectrum σwa(T ) coincides with the set of all isolated points of the spectrum which are eigenvalues of finite multiplicity. In this note, we study the stability of property (w), for a bounded operator T acting on a Banach space, under perturbations by finite rank operators, by nilpotent operator and quasi-nilpotent operators commuting with T .
Original languageEnglish
Pages (from-to)683-692
Number of pages10
JournalJournal of Mathematical Analysis and Applications
Publication statusPublished - 2007

All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics


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