The reconstruction formula for Banach frames and duality

Details The reconstruction formula for Banach frames and duality The reconstruction formula for Banach frames and duality

2011-01-12

arxiv.org/abs/1101.2430v1

Mathematics

Functional Analysis

16 pages

Scientific paper

We study conditions on a Banach frame that ensures the validity of a reconstruction formula. In particular, we show that any Banach frames for (a subspace of) $L_p$ or $L_{p,q}$ ($1\le p < \infty$) with respect to a solid sequence space always satisfies an unconditional reconstruction formula. The existence of reconstruction formulae allows us to prove some James-type results for atomic decompositions: an unconditional atomic decomposition (or unconditional Schauder frame) for $X$ is shrinking (respectively, boundedly complete) if and only if $X$ does not contain an isomorphic copy of $\ell_1$ (respectively, $c_0$).

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