Sharpened Forms of an Inequality of Von Neumann.
Ky Fan (1987)
Mathematische Zeitschrift
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Ky Fan (1987)
Mathematische Zeitschrift
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John Cossey (1968)
Mathematische Zeitschrift
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W.R. Scott (1956/57)
Mathematische Zeitschrift
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Yeshawant V. Thosar (1954)
Mathematische Zeitschrift
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L.J. Bunce, J. Hamhalter (1994)
Mathematische Zeitschrift
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Hichem Ben-El-Mechaiekh, Robert Dimand (2007)
Banach Center Publications
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Yoshihiro Nakamura, Fumio Hiai (1987)
Mathematische Zeitschrift
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David Arcoya, Salvador Villegas (1995)
Mathematische Zeitschrift
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Otto Moeschlin (2006)
Banach Center Publications
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So-Chin Chen (1988)
Mathematische Zeitschrift
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H. Woźniakowski (1971)
Applicationes Mathematicae
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B.H. Neumann (1958)
Mathematische Zeitschrift
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Michael Skeide (2006)
Banach Center Publications
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The category of von Neumann correspondences from 𝓑 to 𝓒 (or von Neumann 𝓑-𝓒-modules) is dual to the category of von Neumann correspondences from 𝓒' to 𝓑' via a functor that generalizes naturally the functor that sends a von Neumann algebra to its commutant and back. We show that under this duality, called commutant, Rieffel's Eilenberg-Watts theorem (on functors between the categories of representations of two von Neumann algebras) switches into Blecher's Eilenberg-Watts theorem...
Robert Pluta, Bernard Russo (2015)
Studia Mathematica
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It is well known that every derivation of a von Neumann algebra into itself is an inner derivation and that every derivation of a von Neumann algebra into its predual is inner. It is less well known that every triple derivation (defined below) of a von Neumann algebra into itself is an inner triple derivation. We examine to what extent all triple derivations of a von Neumann algebra into its predual are inner. This rarely happens but it comes close. We prove a (triple)...
Erwin Neuhardt (1990)
Mathematische Zeitschrift
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Jan Chabrowski, Jianfu Yang (2005)
Annales Polonici Mathematici
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We establish the existence of multiple solutions of an asymptotically linear Neumann problem. These solutions are obtained via the mountain-pass principle and a local minimization.
C. Bandle, M.A. Pozio, A. Tesei (1988)
Mathematische Zeitschrift
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J. Chabrowski (2007)
Colloquium Mathematicae
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We investigate the solvability of the linear Neumann problem (1.1) with L¹ data. The results are applied to obtain existence theorems for a semilinear Neumann problem.