SPECTRA AND PSEUDOSPECTRA OF THE DIRECT SUM OPERATORS

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Sigma Mühendislik ve Fen Bilimleri Dergisi
Volume:38 Issue:3
SPECTRA AND PSEUDOSPECTRA OF THE DIRECT SUM OPERATORS

SPECTRA AND PSEUDOSPECTRA OF THE DIRECT SUM OPERATORS

Authors : Zameddin I ISMAILOV, Pembe IPEK AL

Pages : 1251-1259

View : 26 | Download : 7

Publication Date : 2021-10-05

Article Type : Research Paper

Abstract :In this paper, the relationships between spectrum and pseudospectrum of the direct sum of linear operators in the direct sum of Hilbert spaces and its coordinate operators have been researched. Also, the analogous relations of some numerical characteristics insert ignore into journalissuearticles values(spectral and pseudospectral radii); of such operators have been investigated.
Keywords : Direct sum of operators, spectrum, pseudospectrum, spectral radii

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