We have the following indirect implication of form equivalence classes:
| Implication | Reference |
|---|---|
| 113 \(\Rightarrow\) 8 |
Tychonoff's theorem implies AC, Kelley, J.L. 1950, Fund. Math. Products of compact spaces in the least permutation model, Brunner, N. 1985a, Z. Math. Logik Grundlagen Math. |
| 8 \(\Rightarrow\) 16 | clear |
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement |
|---|---|
| 113: | Tychonoff's Compactness Theorem for Countably Many Spaces: The product of a countable set of compact spaces is compact. |
| 8: | \(C(\aleph_{0},\infty)\): |
| 16: | \(C(\aleph_{0},\le 2^{\aleph_{0}})\): Every denumerable collection of non-empty sets each with power \(\le 2^{\aleph_{0}}\) has a choice function. |
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