We have the following indirect implication of form equivalence classes:
			
| Implication | Reference | 
|---|---|
| 302 \(\Rightarrow\) 392 | clear | 
| 392 \(\Rightarrow\) 394 | clear | 
| 394 \(\Rightarrow\) 337 | clear | 
| 337 \(\Rightarrow\) 92 | clear | 
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement | 
|---|---|
| 302: | Any continuous surjection between compact Hausdorff spaces has an irreducible restriction to a closed subset of its domain. | 
| 392: | \(C(LO,LO)\): Every linearly ordered set of linearly orderable sets has a choice function. | 
| 394: | \(C(WO,LO)\): Every well ordered set of non-empty linearly orderable sets has a choice function. | 
| 337: | \(C(WO\), uniformly linearly ordered): If \(X\) is a well ordered collection of non-empty sets and there is a function \(f\) defined on \(X\) such that for every \(x\in X\), \(f(x)\) is a linear ordering of \(x\), then there is a choice function for \(X\). | 
| 92: | \(C(WO,{\Bbb R})\): Every well ordered family of non-empty subsets of \({\Bbb R}\) has a choice function. | 
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