
handle: 10447/23664
Summary: Weyl's theorem for a bounded linear operator \(T\) on complex Banach spaces, as well as its variants, a-Weyl's theorem and property (w), in general is not transmitted to a perturbation \(T + K\), even when \(K\) is a ``good'' operator, such as a commuting finite rank operator or a compact operator. Weyl's theorems do not survive either when \(K\) is a commuting quasi-nilpotent operator. In this paper, we discuss some sufficient conditions for which Weyl's theorem, a-Weyl's theorem as well as property (w) are transmitted under such kinds of perturbations.
Local spectral properties of linear operators, Weyl type theorems, Fredholm theory, Perturbation theory of linear operators, local spectral theory, (Semi-) Fredholm operators; index theories, Spectrum, resolvent
Local spectral properties of linear operators, Weyl type theorems, Fredholm theory, Perturbation theory of linear operators, local spectral theory, (Semi-) Fredholm operators; index theories, Spectrum, resolvent
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