A new characterization of the closedness of the sum of two subspaces

DOI10.1016/S0252-9602(08)60003-XzbMath1150.47305MaRDI QIDQ933089

Hong-Ke Du, Chun-Yuan Deng

Publication date: 6 August 2008

Published in: Acta Mathematica Scientia. Series B. (English Edition) (Search for Journal in Brave)

zbMATH Keywords

subspaceprojectionsum of closed subspaces

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) Perturbation theory of linear operators (47A55)

Related Items (2)

On the idempotent solutions of a kind of operator equations ⋮ On closedness of the sum of \(n\) subspaces of a Hilbert space

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