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.

引用

页码：883 / 886

页数：4

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