Let \(\varepsilon\) be the \(\sigma\)-ideal generated by closed measure zero sets of reals. We prove that, for \(\varepsilon\), their associated cardinal characteristics (i.e. additivity, covering, uniformity and cofinality) are pairwise different.
Let \(\varepsilon\) be the \(\sigma\)-ideal generated by closed measure zero sets of reals. We prove that, for \(\varepsilon\), their associated cardinal characteristics (i.e. additivity, covering, uniformity and cofinality) are pairwise different.