On Basis Properties of Selfadjoint Opera
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T.Ya. Azizov; A. Dijksma; L.I. Sukhocheva
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Article
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2000
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Elsevier Science
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English
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to heinz langer with best wishes on the occasion of his 65th birthday For a selfadjoint operator function we study the existence of a Riesz basis consisting of eigenvectors if not for the whole space then at least for the closed linear span of all the eigenvectors.