WEYL-VON NEUMANN TYPE THEOREMS WITH THE PERTURBATION VANISHING ON A GIVEN SUBSPACE, I

DOI10.1515/DEMA-1997-0319zbMath0902.47009OpenAlexW1474927396MaRDI QIDQ4373967

Ewa Ignaczak

Publication date: 4 February 1998

Published in: Demonstratio Mathematica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1515/dema-1997-0319

zbMATH Keywords

pure point spectrumdiagonal operatorHilbert-Schmidt normselfadjoint bounded operatorfinite-dimensional orthogonal projection

Mathematics Subject Classification ID

Perturbation theory of linear operators (47A55) Quasitriangular and nonquasitriangular, quasidiagonal and nonquasidiagonal linear operators (47A66)

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