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On finite dimensional subspaces of Banach spaces with local unconditional structure. (English) Zbl 0301.46012

##### MSC:
 46B10 Duality and reflexivity in normed linear and Banach spaces 46B15 Summability and bases; functional analytic aspects of frames in Banach and Hilbert spaces 47B06 Riesz operators; eigenvalue distributions; approximation numbers, $$s$$-numbers, Kolmogorov numbers, entropy numbers, etc. of operators
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