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arXiv 1005.2683math.FA
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张量范数的对称Radon-Nikodrom性质

The symmetric Radon-Nikodým property for tensor norms

Daniel Carando, Daniel Galicer

摘要:

本文引入了$n$阶S-张量生成范数$β$的Radic-Radon-Nikodamm性质(sRN性质),并利用该性质证明了一个关于S-张量范数的Lewis型定理.因此,如果$β$是具有sRN性质的投射s-张量范数,则对每个Asplund空间$E$,规范映射$\widetilde{\otimes}_β^{n,s} E' \to \Big(\widetilde{\otimes}_{β'}^{n,s} E \Big)'$是度量满射。这可以被重新表述为对于某些多项式理想$\Q$的等距同构$\mathcal{Q}^{min}(E) = \mathcal{Q}(E)$。我们还将s-张量范数的sRN性质与不同张量积的Asplund或Radon-Nikodrom性质联系起来。对全张量积也给出了类似的结果。作为应用,得到了关于$n$ -齐次可扩多项式理想的结果,以及Asplund空间上核多项式与整多项式之间的等距同构的一个新证明.

英文摘要:

We introduce the symmetric-Radon-Nikodým property (sRN property) for finitely generated s-tensor norms $β$ of order $n$ and prove a Lewis type theorem for s-tensor norms with this property. As a consequence, if $β$ is a projective s-tensor norm with the sRN property, then for every Asplund space $E$, the canonical map $\widetilde{\otimes}_β^{n,s} E' \to \Big(\widetilde{\otimes}_{β'}^{n,s} E \Big)'$ is a metric surjection. This can be rephrased as the isometric isomorphism $\mathcal{Q}^{min}(E) = \mathcal{Q}(E)$ for certain polynomial ideal $\Q$. We also relate the sRN property of an s-tensor norm with the Asplund or Radon-Nikodým properties of different tensor products. Similar results for full tensor products are also given. As an application, results concerning the ideal of $n$-homogeneous extendible polynomials are obtained, as well as a new proof of the well known isometric isomorphism between nuclear and integral polynomials on Asplund spaces.

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