Complemented subspaces of which embed into
W. B. Johnson (1979-1980)
Séminaire Analyse fonctionnelle (dit "Maurey-Schwartz")
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W. B. Johnson (1979-1980)
Séminaire Analyse fonctionnelle (dit "Maurey-Schwartz")
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G. Schechtman (1978-1979)
Séminaire Analyse fonctionnelle (dit "Maurey-Schwartz")
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H. P. Rosenthal (1978-1979)
Séminaire Analyse fonctionnelle (dit "Maurey-Schwartz")
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W. B. Johnson (1977)
Compositio Mathematica
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T. Starbird (1975-1976)
Séminaire Analyse fonctionnelle (dit "Maurey-Schwartz")
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Gilles Pisier (1978)
Compositio Mathematica
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Antonio Avilés, Félix Cabello Sánchez, Jesús M. F. Castillo, Manuel González, Yolanda Moreno (2013)
Fundamenta Mathematicae
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We prove that no ultraproduct of Banach spaces via a countably incomplete ultrafilter can contain c₀ complemented. This shows that a "result" widely used in the theory of ultraproducts is wrong. We then amend a number of results whose proofs have been infected by that statement. In particular we provide proofs for the following statements: (i) All M-spaces, in particular all C(K)-spaces, have ultrapowers isomorphic to ultrapowers of c₀, as also do all their complemented subspaces isomorphic...
Kamil John (1992)
Czechoslovak Mathematical Journal
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