We have the following indirect implication of form equivalence classes:
Implication | Reference |
---|---|
86-alpha \(\Rightarrow\) 8 | clear |
8 \(\Rightarrow\) 418 |
Metric spaces and the axiom of choice, De-la-Cruz-Hall-Howard-Keremedis-Rubin-2002A[2002A], Math. Logic Quart. |
Here are the links and statements of the form equivalence classes referenced above:
Howard-Rubin Number | Statement |
---|---|
86-alpha: | \(C(\aleph_{\alpha},\infty)\): If \(X\) is a set of non-empty sets such that \(|X| = \aleph_{\alpha }\), then \(X\) has a choice function. |
8: | \(C(\aleph_{0},\infty)\): |
418: | DUM(\(\aleph_0\)): The countable disjoint union of metrizable spaces is metrizable. |
Comment: