Mathematical Conferences Niš, Serbia, 13th Serbian Mathematical Congress

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On closed upper and lower semi-Browder operators
Snezana Zivkovic-Zlatanovic, Milos Cvetkovic, Dragan Djordjevic

Last modified: 2014-02-13

Abstract


We give several necessary and sufficient conditions for a closed operator to be upper (lower) semi-Browder. We also apply these results to give some characterizations of upper (lower) semi-Browder spectrum.