We have the following indirect implication of form equivalence classes:
			
| Implication | Reference | 
|---|---|
| 17 \(\Rightarrow\) 132 | Amorphe Potenzen kompakter Raume, Brunner,  N. 1984b, Arch. Math. Logik Grundlagenforschung | 
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement | 
|---|---|
| 17: | Ramsey's Theorem I: If \(A\) is an infinite set and the family of all 2 element subsets of \(A\) is partitioned into 2 sets \(X\) and \(Y\), then there is an infinite subset \(B\subseteq A\) such that all 2 element subsets of \(B\) belong to \(X\) or all 2 element subsets of \(B\) belong to \(Y\). (Also, see Form 325.), Jech [1973b], p 164 prob 11.20. | 
| 132: | \(PC(\infty, <\aleph_0,\infty)\): Every infinite family of finite sets has an infinite subfamily with a choice function. | 
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