Title of article :
A Note on Essential Spectra of Linear Operator Pencils
Author/Authors :
Živković-Zlatanović ، Snežana Č. Department of Mathematics - Faculty of Sciences and Mathematics - University of Niš , Chaâben ، Hamadi Department of Mathematics - Faculty of Sciences of Sfax - University of Sfax , Walha ، Ines Department of Mathematics - Faculty of Sciences of Sfax - University of Sfax , Abdmouleh ، Faiçal Department of Mathematics - School of Mathematics - Higher Institute of Industrial Management
Abstract :
In this note, we provide some characterizations of left (right) Browder and upper (lower) semi-Browder operators, and get some results regarding boundaries and connected hulls of essential spectra of bounded linear operator pencils. Also, we investigate some geometric characteristics of these spectra.
Keywords :
Bounded linear operator pencil , Banach space , Left (right) S , Fredholm spectrum , Left (right) S , Weyl spectrum , Left (right) S , Browder spectrum , Left (right) S , Browder radius
Journal title :
Bulletin of the Iranian Mathematical Society
Journal title :
Bulletin of the Iranian Mathematical Society
