Some description of essential structured approximate and defect pseudospectrum

DOI10.11568/kjm.2020.28.4.673OpenAlexW3116219242MaRDI QIDQ5152012

Kamel Mahfoudhi, Aymen Ammar, Aref Jeribi

Publication date: 18 February 2021

Full work available at URL: http://journal.kkms.org/index.php/kjm/article/download/903/566

zbMATH Keywords

pseudospectrumstructured essential approximate pseudospectrumstructured essential defect pseudospectrum

Mathematics Subject Classification ID

Several-variable operator theory (spectral, Fredholm, etc.) (47A13) Perturbation theory of linear operators (47A55) (Semi-) Fredholm operators; index theories (47A53) Spectra in general topology (54B35)

Related Items (1)

Generalized Drazin-meromorphic pseudospectrum for a bounded linear operator on a Banach space

Cites Work

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• Discrete approximation of unbounded operators and approximation of their spectra

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