Determinacy from strong compactness of ω1
Determinacy from strong compactness of ω1
复制标题
来自 Ï1 的强紧致性的确定性
DOI:
10.1016/j.apal.2021.102944
复制
发表时间:
2021
影响因子:
0.8
通讯作者:
Wilson, Trevor
中科院分区:
文献类型:
--
作者:
Trang, Nam;Wilson, Trevor
In the absence of the Axiom of Choice, the “small” cardinal ω 1 can exhibit properties more usually associated with large cardinals, such as strong compactness and supercompactness. For a local version of strong compactness, we say that ω 1 is X-strongly compact (where X is any set) if there is a fine, countably complete measure on℘ ω 1 (X). Working in ZF+ DC, we prove that the℘(ω 1)-strong compactness and℘(R)-strong compactness of ω 1 are equiconsistent with AD and AD R+ DC respectively, where AD denotes the Axiom of Determinacy and AD R denotes the Axiom of Real Determinacy. The℘(R)-supercompactness of ω 1 is shown to be slightly stronger than AD R+ DC, but its consistency strength is not computed precisely. An equiconsistency result at the level of AD R without DC is also obtained.
登录
查看更多内容
影响因子:
0.6
作者:
J. Steel
通讯作者:
J. Steel
DOI:
10.1007/bfb0069299
发表时间:
2020
期刊:
Large Cardinals, Determinacy and Other Topics
影响因子:
--
作者:
R. Solovay
通讯作者:
R. Solovay
影响因子:
0.6
作者:
J. Steel;W. Woodin;A. Kechris;B. Löwe
通讯作者:
B. Löwe
DOI:
10.2307/2687750
发表时间:
2001
期刊:
Bull. Symb. Log.
影响因子:
--
作者:
E. Schimmerling;M. Zeman
通讯作者:
M. Zeman
DOI:
10.1017/jsl.2014.65
发表时间:
2015
期刊:
The Journal of Symbolic Logic
影响因子:
--
作者:
Nam Trang
通讯作者:
Nam Trang