We have the following indirect implication of form equivalence classes:

47-n \(\Rightarrow\) 47-n
given by the following sequence of implications, with a reference to its direct proof:

Implication Reference
47-n \(\Rightarrow\) 47-n Axiom of choice for finite sets, Mostowski, A. 1945, Fund. Math.
Finite axioms of choice, Truss, J. K. 1973a, Ann. Math. Logic

Here are the links and statements of the form equivalence classes referenced above:

Howard-Rubin Number Statement
47-n:

If \(n\in\omega-\{0,1\}\), \(C(WO,n)\): Every well ordered collection of \(n\)-element sets has a choice function.

47-n:

If \(n\in\omega-\{0,1\}\), \(C(WO,n)\): Every well ordered collection of \(n\)-element sets has a choice function.

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