Dane publikacji
Tom 173
Zeszyt 1
Czasopismo: Colloquium Mathematicum
Strony: 123-157
Data publikacji online: 10.04.2023
Liczba wyświetleń: 0
Liczba pobrań: 0
Abstrakt
Let $\mathcal E$ be the $\sigma $-ideal generated by the closed measure zero sets of reals. We use an ultrafilter-extendable matrix iteration of ccc posets to force that, for $\mathcal E$, their associated cardinal characteristics (i.e. additivity, covering, uniformity, and cofinality) are pairwise different.