On generic extensions without the axiom of choice
On generic extensions without the axiom of choice
复制标题
关于没有选择公理的通用扩展
DOI:
10.2307/2273318
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发表时间:
1983
影响因子:
0.6
通讯作者:
G. Monro
中科院分区:
文献类型:
--
作者:
G. Monro
Abstract Let ZF denote Zermelo-Fraenkel set theory (without the axiom of choice), and let M be a countable transitive model of ZF. The method of forcing extends M to another model M[G] of ZF (a “generic extension”). If the axiom of choice holds in M it also holds in M[G], that is, the axiom of choice is preserved by generic extensions. We show that this is not true for many weak forms of the axiom of choice, and we derive an application to Boolean toposes.