Electron. J. Diff. Eqns., Vol. 2007(2007), No. 11, pp. 1-16.

On the essential spectra of matrix operators and applications

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
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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