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Journals / Sigma Mühendislik ve Fen Bilimleri Dergisi / 2026 / Volume: 38 Issue: 3

SPECTRA AND PSEUDOSPECTRA OF THE DIRECT SUM OPERATORS

Zameddin I. Ismaılov(Karadeniz Technical University, Department of Mathematics)0000-0001-5193-5349
Pembe Ipek Al(Karadeniz Technical University, Department of Mathematics)0000-0002-6111-1121
Pages
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Publication Date
2021-10-05
DOI
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AI Summary & Key Takeaways

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⚡ TL;DR(Too Long; Didn't Read)

Also, the analogous relations of some numerical characteristics (spectral and pseudospectral radii) of such operators have been investigated.

📌 3 Key Takeaways

🎯
Objective & Hypothesis: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.
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Key Findings & Data: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.
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Conclusion & Impact:Also, the analogous relations of some numerical characteristics (spectral and pseudospectral radii) of such operators have been investigated.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Direct sum of operators · spectrum · pseudospectrum

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 (spectral and pseudospectral radii) of such operators have been investigated.

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Cite This Article

Ismaılov, Z. I., Al, P. I. (2021). SPECTRA AND PSEUDOSPECTRA OF THE DIRECT SUM OPERATORS. Sigma Mühendislik ve Fen Bilimleri Dergisi, Volume: 38 Issue: 3. https://ajindex.com/articles/1344800

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