$\mathbf{S}$-PSEUDOSPECTRA AND $\mathbf{S}$-ESSENTIAL PSEUDOSPECTRA

Authors

  • A. Ammar University of Sfax, Faculty of Sciences of Sfax, Department of Mathematics, Tunisia Author
  • H. Daoud University of Sfax, Faculty of Sciences of Sfax, Department of Mathematics, Tunisia Author
  • A. Jeribi University of Sfax, Faculty of Sciences of Sfax, Department of Mathematics, Tunisia Author

Keywords:

Linear relation, $\mathcal{S}$-pseudospectra, $\mathcal{S}$-essential pseudospectra

Subjects:

47A06

Abstract

In the present paper, we introduce and study the $\mathcal{S}$-pseudospectra and the essential $\mathcal{S}$-pseudospectra of linear relations. We start bygiving the definition and we investigate the characterization and some properties of these $\mathcal{S}$-pseudospectra.

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Published

2020-04-15

Issue

Vol. 72 No. 2 (2020): Vol. 72, Issue 2

Section

Articles

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Copyright (c) 2020 Authors retain copyright to their work.

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This work is licensed under a Creative Commons Attribution 4.0 International License.