Projections on Banach spaces with symmetric bases
P. Casazza, Bor Lin (1974)
Studia Mathematica
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P. Casazza, Bor Lin (1974)
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Catherine Finet (1988)
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S. Troyanski (1975)
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A. Pełczyński, P. Wojtaszczyk (1971)
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I. Singer (1962)
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Jorge Mújica (1997)
Revista Matemática de la Universidad Complutense de Madrid
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In this survey we show that the separable quotient problem for Banach spaces is equivalent to several other problems for Banach space theory. We give also several partial solutions to the problem.
Lech Drewnowski (1987)
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William Johnson (1974)
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A. Pełczyński (1971)
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G. Androulakis (1998)
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Let (x_n) be a sequence in a Banach space X which does not converge in norm, and let E be an isomorphically precisely norming set for X such that (*) ∑_n |x*(x_{n+1} - x_n)| < ∞, ∀x* ∈ E. Then there exists a subsequence of (x_n) which spans an isomorphically polyhedral Banach space. It follows immediately from results of V. Fonf that the converse is also true: If Y is a separable isomorphically polyhedral Banach space then there exists a normalized M-basis (x_n) which spans Y and...
Haskell Rosenthal (1976)
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