| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4672825 | Indagationes Mathematicae | 2016 | 13 Pages |
Abstract
In this paper, we concern ourselves with essential spectra of an operator AA which is subjected to structured perturbation of the form A⟶A+CDBA⟶A+CDB where BB, CC are given bounded operators and DD is unknown disturbance operator that satisfies ‖D‖<ε‖D‖<ε for a given ε>0ε>0. Thereby, we investigate the structured essential pseudospectra of the sum of two operators acting on a Banach space. Furthermore, we establish characterizations of the structured Schechter essential pseudospectrum of a closed, densely defined linear operator.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematics (General)
Authors
Asrar Elleuch, Aref Jeribi,