A remark about separation of $K$-analytic sets in the product spaces

A remark about separation of $K$-analytic sets in the product spaces
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关于产品空间中 $K$ 分析集分离的评论

DOI:
10.1090/s0002-9939-1985-0770555-8
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发表时间:
1985
期刊:
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影响因子:
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通讯作者:
Leszek Pi polhkatkiewicz
Leszek Pi polhkatkiewicz
中科院分区:
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文献类型:
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作者:
Leszek Pi polhkatkiewicz

文献摘要

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给出了一个著名的关于协解析集在具有“大”截面的平面上用Borel集逼近的定理的直接证明。这一定理的遗传AT-解析空间的推广也被认为是。
A direct proof, using only "classical" notions, of a well-known theorem about approximation of coanalytic sets in the plane with "large" sections by Borel sets is given. A generalization of this theorem for hereditarily AT-analytic spaces is also considered.