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arXiv 1402.2123math.FA
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关于$\mathcal{L}_{\infty}$ -空间的钱问题

On Qian's problem for $\mathcal{L}_{\infty}$-spaces

Duanxu Dai

摘要:

本文主要研究$\mathcal{L}_{\infty}$ -空间的钱问题。首先,在$K$具有C $\check{e}$ ch-Stone性质的假设下,给出了$C(K)$ -空间的钱氏问题的一个肯定回答.其次,我们得到了可分内射空间的一些定量刻画,在可分普适性的背景下,这些刻画给出了Qian's 1995问题的一个肯定回答。第三,证明了一个锐化的定量的推广的Sobczyk定理,给出了钱氏问题的锐化常数($α,γ$)。最后,我们给出了$\mathcal{L}_{\infty}$ -空间的一个更一般的Figiel定理。

英文摘要:

In this paper we devote to study Qian's problem for $\mathcal{L}_{\infty}$-spaces. Firstly, a positive answer to Qian's problem for $C(K)$-spaces is given by the assumption that $K$ has the C$\check{e}$ch-Stone property. Secondly, we obtain quantitative characterizations of separably injective spaces that turn out to give a positive answer to Qian's problem of 1995 in the setting of separable universality. Thirdly, we prove a sharpen quantitative and generalized Sobczyk theorem, which gives sharpen constants ($α,γ$) for Qian's Problem. Finally, we give a more generalized Figiel theorem for $\mathcal{L}_{\infty}$-spaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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