论文标题
友好的迭代迫使$ \ Mathcal {e} $的四个基本特征可以是成对的
A friendly iteration forcing that the four cardinal characteristics of $\mathcal{E}$ can be pairwise different
论文作者
论文摘要
令$ \ MATHCAL {E} $为$σ$ - 理想的封闭度量零集的真实集合。我们使用CCC POSET的Ultrafilter-Extendable矩阵迭代来迫使，对于$ \ Mathcal {E} $，它们相关的基本特性（即\添加性，覆盖率，均匀，均匀性和辅助性）是成对的。
Let $\mathcal{E}$ be the $σ$-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.
