Truncation method for operators with disconnected essential spectrum

DOI10.1007/BF02829650zbMath1016.47002OpenAlexW1989871572MaRDI QIDQ1599750

M. N. N. Namboodiri

Publication date: 17 August 2003

Published in: Proceedings of the Indian Academy of Sciences. Mathematical Sciences (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf02829650

zbMATH Keywords

essential spectrumsingular valuesgapstruncation methodself-adjoint operators

Mathematics Subject Classification ID

Hermitian and normal operators (spectral measures, functional calculus, etc.) (47B15) Spectrum, resolvent (47A10)

Related Items (2)

Spectral Approximation of Bounded Self-Adjoint Operators—A Short Survey ⋮ Perturbation of operators and approximation of spectrum

Cites Work

• Classes of linear operators. Vol. I
• \(C^*\)-algebras and numerical linear algebra
• Approximation of approximation numbers by truncation
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