Title of article
Characterization of Essential Spectra Involving Weakly Demicompact Operators on Banach Spaces
Author/Authors
Jeribi ، Aref Department of Mathematics - Faculty of Science - University of Sfax , Krichen ، Bilel Department of Mathematics - Faculty of Science - University of Sfax , Salhi ، Makrem Department of Mathematics - Faculty of Science - University of Sfax
From page
1513
To page
1538
Abstract
In this paper, we prove that a weakly demicompact linear operator with respect to an unbounded operator S0 can be characterized by measures of weak noncompactness. Moreover, its relationshipwith semi-Fredholm operators aswell as the characterization of its S0-essential spectrum is studied.
Keywords
Weakly demicompact operator , Fredholm and semi , Fredholm operators , Measure of weak noncompactness , Essential spectrum
Journal title
Bulletin of the Iranian Mathematical Society
Journal title
Bulletin of the Iranian Mathematical Society
Record number
2756964
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