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On the fundamental lemma of interpolation theory - MaRDI portal

On the fundamental lemma of interpolation theory (Q909177)

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scientific article; zbMATH DE number 4136698
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On the fundamental lemma of interpolation theory
scientific article; zbMATH DE number 4136698

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    On the fundamental lemma of interpolation theory (English)
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    1990
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    The authors provide a new proof of a stronger version of the fundamental lemma of interpolation theory [see \textit{J. Bergh} and \textit{J. Löfström}, Interpolation spaces: An introduction p. 45 (1976; Zbl 0344.46071)], which gives the best known value of the constant \(\beta\), namely \(\beta =3+2\sqrt{2}\) as announced by A. A. Dmitriev. They also obtain a continuous version and an E-functional version of this strong fundamental lemma.
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    E-functional
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