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Mat. Zametki, 2024 Volume 115, Issue 6, Pages 973–982 (Mi mzm14234)

Papers published in the English version of the journal

On the Convergence of Generalized Pseudo-Spectrum

M. A. Mansouriab, A. Khellafbc, H. Guebbaiab

a Département de Mathématiques, Université 8 mai 1945, Guelma, Algérie
b Laboratoire de Mathématiques Appliquées et Modélisation (LMAM), Université 8 mai 1945, Guelma, Algérie
c École Nationale Polytechnique de Constantine, Constantine, Algérie

Abstract: In this paper, we study the convergence of generalized pseudo-spectrum associated with bounded operators in a Hilbert space. We prove that the approximate generalized pseudo-spectrum converges to the exact set under norm convergence. To prove this result, we use the Hausdorff distance and the assumption that the generalized resolvent operator is not constant on any open subset of the generalized resolvent set.

Keywords: generalized pseudo-spectrum, approximated generalized pseudo-spectrum, Hausdorff distance.

MSC: 34L16, 47A75, 35J10

Received: 25.01.2024
Revised: 18.03.2024

Language: English


 English version:
Mathematical Notes, 2024, 115:6, 973–982

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© Steklov Math. Inst. of RAS, 2024