Drazin invertibility of upper triangular operator matrices |
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Authors: | D S Cvetković-Ilić V Pavlović |
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Institution: | Department of Mathematics, Faculty of Science and Mathematics, University of Nis, Nis, Serbia. |
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Abstract: | In this paper, the existence is considered of a Drazin invertible completion of an upper triangular operator matrix. The proof of a recently published result is corrected. |
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Keywords: | Drazin spectrum left (right) Drazin invertibility ascent (descent) |
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