Set theory without choice: not everything on cofinality is possible
Set theory without choice: not everything on cofinality is possible
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没有选择的集合论:并非关于共尾性的一切都是可能的
DOI:
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发表时间:
1995
影响因子:
0.3
通讯作者:
S. Shelah
中科院分区:
文献类型:
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作者:
S. Shelah
Abstract.We prove in ZF+DC, e.g. that: if
$mu=|{cal H}(mu)|$ and
$mu>cf(mu)>aleph_0$ then
$mu ^+$ is regular but non measurable. This is in contrast with the results on measurability for
$mu=aleph_omega$ due to Apter and Magidor [ApMg].