We have the following indirect implication of form equivalence classes:
Implication | Reference |
---|---|
62 \(\Rightarrow\) 285 |
On functions without fixed points, Wi'sniewski, K. 1973, Comment. Math. Prace Mat. |
Here are the links and statements of the form equivalence classes referenced above:
Howard-Rubin Number | Statement |
---|---|
62: | \(C(\infty,< \aleph_{0})\): Every set of non-empty finite sets has a choice function. |
285: | Let \(E\) be a set and \(f: E\to E\), then \(f\) has a fixed point if and only if \(E\) is not the union of three mutually disjoint sets \(E_1\), \(E_2\) and \(E_3\) such that \(E_i \cap f(E_i) = \emptyset\) for \(i=1, 2, 3\). |
Comment: