Abstract
Weyl type theorems have been proved for a considerably large number of classes of operators. In this paper, by introducing the class of quasi totally hereditarily normaloid operators, we obtain a theoretical and general framework from which Weyl type theorems may be promptly established for many of these classes of operators. This framework also entails Weyl type theorems for perturbations f(T+K), where K is algebraic and commutes with T, and f is an analytic function, defined on an open neighborhood of the spectrum of $T+K, such that f is non constant on each of the components of its domain.
Lingua originale | English |
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pagine (da-a) | 371-384 |
Numero di pagine | 14 |
Rivista | Integral Equations and Operator Theory |
Volume | 77 |
Stato di pubblicazione | Published - 2013 |
All Science Journal Classification (ASJC) codes
- ???subjectarea.asjc.2600.2603???
- ???subjectarea.asjc.2600.2602???