The covering number and the transitive covering number may be totally different

被引：0
|
作者：
Jan Kraszewski
机构：
来源：
Acta Mathematica Hungarica | 2004年 / 105卷
关键词：
Abelian groups; ideals; covering number; Hamel basis;
D O I：
暂无
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学科分类号：
摘要：
We construct a translation invariant σ-ideal T(κ) (where κ is an infinite cardinal number) such that covt (T(κ)) = 2κ while cov (T(κ)) = cof (T(κ)) = ω1. The constructions can be carried out in R as well.
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页码：115 / 119
页数：4
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