In this paper, we investigate the Gustafson, Weidmann, Kato, Wolf, Schechter and Browder essential spectra of a 2×2 block matrix operator defined on a Banach space where entries are unbounded operators between Banach spaces and with domains consisting of vectors satisfying certain relations between
Relatively Strictly Singular Perturbations, Essential Spectra, and Application to Transport Operators
✍ Scribed by Khalid Latrach; Abdelkader Dehici
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 170 KB
- Volume
- 252
- Category
- Article
- ISSN
- 0022-247X
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✦ Synopsis
The stability of essential spectra of a closed, densely defined linear operator A on L -spaces, 1 F p F ϱ, when A is subjected to a perturbation by a bounded p strictly singular operator was discussed in a previous paper by K. Latrach and A.
Ž .
📜 SIMILAR VOLUMES
This paper is devoted to the investigation of the essential approximate point spectrum and the essential defect spectrum of a 2 × 2 block operator matrix on a product of Banach spaces. The obtained results are applied to a two-group transport operators with general boundary conditions in the Banach
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