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arXiv 1012.5512math.FAmath.GN
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低权Radon-Nikodrom紧空间与巴拿赫空间

Radon-Nikodým compact spaces of low weight and Banach spaces

Antonio Avilés

摘要:

证明了权小于b的Radon-Nikodrom紧空间的连续象是Radon-Nikodrom紧的.作为Banach空间的对应,密度特征小于b的Asplund生成巴拿赫空间的子空间是Asplund生成的.在这种情况下,另外,存在Asplund生成空间的非Asplund生成的子空间,其密度特征恰好为b。

英文摘要:

We prove that a continuous image of a Radon-Nikodým compact space of weight less than b is Radon-Nikodým compact. As a Banach space counterpart, subspaces of Asplund generated Banach spaces of density character less than b are Asplund generated. In this case, in addition, there exists a subspace of an Asplund generated space which is not Asplund generated which has density character exactly b.

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