Perturbation of semi-Browder linear relations by commuting Riesz operators |
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Authors: | Hafsa Bouaniza Yosra Chamkha |
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Institution: | Faculty of sciences of Sfax, University of Sfax, Sfax, Tunisia. |
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Abstract: | This paper is devoted to the investigation of the stability of upper semi-Browder, lower semi-Browder and Browder linear relations which satisfy the stabilization property, under commuting Riesz operator perturbations. As applications, we infer the invariance of the corresponding Browder’s essential approximate point spectrum, Browder’s essential defect spectrum and Browder’s essential spectrum under commuting Riesz operator perturbations. |
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Keywords: | Upper semi-Browder linear relations lower semi-Browder linear relations perturbation of semi-Browder linear relations Riesz operator |
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