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A tensor norm preserving unconditionality for $ \mathcal{L}_p$-spaces
Authors:Andreas Defant  David Pé  rez-Garcí  a
Institution:Fachbereich Mathematik, Universitaet Oldenburg, D--26111, Oldenburg, Germany ; Área de Matemática Aplicada, Universidad Rey Juan Carlos, C/ Tulipan s/n, 28933 Móstoles (Madrid), Spain
Abstract:We show that, for each $ n\in\mathbb{N}$, there is an $ n$-tensor norm $ \alpha$ (in the sense of Grothendieck) with the surprising property that the $ \alpha$-tensor product $ \tilde{\bigotimes}_\alpha(Y_1, \ldots, Y_n)$ has local unconditional structure for each choice of $ n$ arbitrary $ \mathcal{L}_{p_j}$-spaces $ Y_j$. In fact, $ \alpha$ is the tensor norm associated to the ideal of multiple $ 1$-summing $ n$-linear forms on Banach spaces.

Keywords:Unconditional bases  tensor products  $p$-summing operators  multilinear operators
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