Ultrafilters on singular cardinals of uncountable cofinality
James CummingsCharles Morgan
所有作者
James CummingsCharles Morgan
文献摘要
We prove that consistently there is a singular cardinal κ of
uncountable cofinality such that 2κ is weakly inaccessible, and every
regular cardinal strictly between κ and 2κ is the character of
some uniform ultrafilter on κ.