REPRESENTING PROJECTIVE SETS AS UNIONS OF BOREL SETS

被引：2
|
作者：
BECKER, H
机构：
来源：
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY | 1995年 / 123卷 / 03期
关键词：
D O I：
10.2307/2160814
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
We consider a method of representing projective sets by a particular type of union of Borel sets, assuming AD. We prove a generalization of the theorem that a set is Sigma(2)(1) iff it is the union of omega(1) Borel sets.
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页码：883 / 886
页数：4
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