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- W2020040198 abstract "Siano U e V due sottospazi chiusi di uno spazio di Banach X, Pu e Pv due operatori di migliore approssimazione su U (resp) V e sia K=(I−PV)(I−PU). Von Neumann ha provato che Knx converge verso((I - P_{overline {U + V} } )x) per ogni x e ogni coppia U, V se X e uno spazio di Hilbert. Teoremi di convergenza in ipotesi piu restrittive sono stati dati da diversi autori in spazi uniformemente convessi. Il teorema di Von Neumann e questi ulteriori risultati sono qui estesi al caso in oui U e V sono due «wedges» chiusi. Alcuni nuovi risultati per la convergenza di Kn sono inoltre provati quando X=C(S×T), U=C(S) e V=C(T)." @default.
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- W2020040198 date "1985-12-01" @default.
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- W2020040198 title "Two extensions of the alternating algorithm of von Neumann" @default.
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- W2020040198 doi "https://doi.org/10.1007/bf01766864" @default.
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