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zbMath0714.47010MaRDI QIDQ3200082

Shan Li Sun

Publication date: 1989

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

selfadjoint operator unitary operator finite rank perturbation \(\Pi \) \({}_ k\) space Hilbert reducibility

Mathematics Subject Classification ID

Perturbation theory of linear operators (47A55) Linear operators on spaces with an indefinite metric (47B50)

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