On normal precipitous ideals
On normal precipitous ideals
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DOI:
10.1007/s11856-010-0009-x
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发表时间:
2010-03
影响因子:
1
通讯作者:
M. Gitik
中科院分区:
文献类型:
--
作者:
M. Gitik
An old question of T. Jech and K Prikry asks whether the existence of a precipitous ideal implies the existence of a normal precipitous one. The aim of the paper is to prove some results in the positive direction. In particular, it is shown that under some mild assumptions, the existence of a precipitous ideal over ℵ1implies the existence of a normal precipitous ideal over ℵ1once a Cohen subset is added to ℵ2.