We have the following indirect implication of form equivalence classes:
| Implication | Reference |
|---|---|
| 64 \(\Rightarrow\) 64 |
The independence of various definitions of finiteness, Levy, A. 1958, Fund. Math. |
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement |
|---|---|
| 64: | \(E(I,Ia)\) There are no amorphous sets. (Equivalently, every infinite set is the union of two disjoint infinite sets.) |
| 64: | \(E(I,Ia)\) There are no amorphous sets. (Equivalently, every infinite set is the union of two disjoint infinite sets.) |
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