We have the following indirect implication of form equivalence classes:
| Implication | Reference |
|---|---|
| 36 \(\Rightarrow\) 62 |
On Loeb and weakly Loeb Hausdorff spaces, Tachtsis, E. 2000, Math. Japon. |
| 62 \(\Rightarrow\) 121 | clear |
| 121 \(\Rightarrow\) 33-n | clear |
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement |
|---|---|
| 36: | Compact T\(_2\) spaces are Loeb. (A space is Loeb if the set of non-empty closed sets has a choice function.) |
| 62: | \(C(\infty,< \aleph_{0})\): Every set of non-empty finite sets has a choice function. |
| 121: | \(C(LO,<\aleph_{0})\): Every linearly ordered set of non-empty finite sets has a choice function. |
| 33-n: | If \(n\in\omega-\{0,1\}\), \(C(LO,n)\): Every linearly ordered set of \(n\) element sets has a choice function. |
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