No covering with nowhere dense P-sets in the Cohen model
Alan DowOsvaldo Guzmán
所有作者
Alan DowOsvaldo Guzmán
文献摘要
We prove that if less than ℵω-many Cohen reals are added to a model of CH, then ω∗ can not be covered by nowhere dense P-sets (equivalently, there is an ultrafilter on ω that does not contain a tower).