Mondher Damak, Aref Jeribi
Abstract:
In this paper, we investigate the essential spectra of some
matrix operators on Banach spaces. The results obtained
are used for describing the essential spectra of differential
operators.
Submitted October 3, 2006. Published January 8, 2007.
Math Subject Classifications: 34L40, 47A11, 47A53, 47B50.
Key Words: Matrix operators; essential spectra; Fredholm perturbation.
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Mondher Damak Département de Mathématiques, Université de Sfax Faculté des Sciences de Sfax Route de Soukra, Km 3.5, B.P. 802 3018 Sfax, Tunisie email: Mondher.Damak@fss.rnu.tn |
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Aref Jeribi Département de Mathématiques, Université de Sfax Faculté des Sciences de Sfax Route de Soukra, Km 3.5, B.P. 802 3018 Sfax, Tunisie email: Aref.Jeribi@fss.rnu.tn |
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