The Diagonal Entries in the Formula `Quasitriangular - Compact = Triangular', and Restrictions of Quasitriangularity
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Publication:4722631
DOI10.2307/2000608zbMath0614.47014OpenAlexW4233402828MaRDI QIDQ4722631
Publication date: 1986
Published in: Transactions of the American Mathematical Society (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.2307/2000608
compact perturbationssimilaritynest algebrasquasitriangular operatorsemi- Fredholmquasitriangular-compact \(=\,triangular\)Weyl spectrum of T
Spectrum, resolvent (47A10) Perturbation theory of linear operators (47A55) (Semi-) Fredholm operators; index theories (47A53) Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators (47A66)
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