Document Zbl 0492.47034

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Zap. Nauchn. Semin. Leningr. Otd. Mat. Inst. Steklova 122, 5-12 (1982).

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scan of Zbl 0492.47034

47H10	Fixed-point theorems
47J05	Equations involving nonlinear operators (general)
47H09	Contraction-type mappings, nonexpansive mappings, \(A\)-proper mappings, etc.
46C05	Hilbert and pre-Hilbert spaces: geometry and topology (including spaces with semidefinite inner product)

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