Monday, 23 May 2011

Wseas Transactions

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Transactions: WSEAS TRANSACTIONS ON MATHEMATICS
Transactions ID Number: 53-542
Full Name: Aref Jeribi
Position: Professor
Age: ON
Sex: Male
Address: Université de Sfax, Tunisie
Country: TUNISIA
Tel: 21698564760
Tel prefix:
Fax: 21674274437
E-mail address: aref.jeribi@fss.rnu.tn
Other E-mails: aref.jeribi@fss.rnu.tn
Title of the Paper: On a Characterization of the Essential Spectra of a 3  3 Operator Matrix and Application to Three-Group Transport Operators
Authors as they appear in the Paper: Aymen Ammar, Aref Jeribi and Nedra Moalla
Email addresses of all the authors: ammar@yahoo.fr; moalla@yahoo.com
Number of paper pages: 26
Abstract: In this paper we study spectral properties of a 3  3 block operator matrix by means of the Browder resolvent set: In particular, it is shown that, under certain conditions, this block operator matrix denes a closable operator and the essential spectra of this operator are determined. Furthermore, we apply the obtained results to describe essential spectra of a three-group transport operator in the Banach space L1([��a; a]  [��1; 1]); a > 0.
Keywords: Operator matrix, essential spectra, Browder resolvent, Fredholm perturbations,
EXTENSION of the file: .pdf
Special (Invited) Session:
Organizer of the Session:
How Did you learn about congress: Operator theory, Transport equation
IP ADDRESS: 41.229.116.4