Spectral description of Fredholm operators via polynomially Riesz operators perturbation
DOI10.1515/gmj-2021-2138OpenAlexW4214835978MaRDI QIDQ2671459
Faiçal Abdmouleh, Ines Walha, Hassen Khlif
Publication date: 3 June 2022
Published in: Georgian Mathematical Journal (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1515/gmj-2021-2138
Fredholm operatoressential spectrasemi-Fredholm operatorRiesz operatorsoperator matrixleft-right Fredholm operatorpolynomially Riesz operators
Riesz operators; eigenvalue distributions; approximation numbers, (s)-numbers, Kolmogorov numbers, entropy numbers, etc. of operators (47B06) Spectrum, resolvent (47A10) Groups and semigroups of linear operators (47D03) (Semi-) Fredholm operators; index theories (47A53) Spectral theory of functional-differential operators (34K08)
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