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arXiv 1702.05050math.FA
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向量值函数在巴拿赫空间中的某些几何性质

On certain geometric properties in Banach spaces of vector-valued functions

Jan-David Hardtke

摘要:

我们考虑了巴拿赫空间的某些几何性质,例如八面体性、几乎正方性、繁茂性和Daugavet性质。对于这类性质,我们得到了一个一般的约化定理,粗略地说,它陈述如下:如果所讨论的性质在某些有限绝对和(例如有限$\ell^p$ -和)下是稳定的,那么它在相应的Köthe-Bochner空间(例如$L^p$ -Bochner空间)的形成下也是稳定的。从这个一般性定理出发,我们得到了一些新的结果,以及关于八面体空间和几乎平方空间及其相关空间、直径为2的性质、茂盛空间和其他类的已知结果的一些替代证明。

英文摘要:

We consider a certain type of geometric properties of Banach spaces, which includes for instance octahedrality, almost squareness, lushness and the Daugavet property. For this type of properties, we obtain a general reduction theorem, which, roughly speaking, states the following: if the property in question is stable under certain finite absolute sums (for example finite $\ell^p$-sums), then it is also stable under the formation of corresponding Köthe-Bochner spaces (for example $L^p$-Bochner spaces). From this general theorem, we obtain as corollaries a number of new results as well as some alternative proofs of already known results concerning octahedral and almost square spaces and their relatives, diameter-two-properties, lush spaces and other classes.

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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