We have the following indirect implication of form equivalence classes:
| Implication | Reference |
|---|---|
| 193 \(\Rightarrow\) 188 |
Injectivity, projectivity and the axiom of choice, Blass, A. 1979, Trans. Amer. Math. Soc. |
| 188 \(\Rightarrow\) 106 |
Injectivity, projectivity and the axiom of choice, Blass, A. 1979, Trans. Amer. Math. Soc. |
| 106 \(\Rightarrow\) 126 |
Injectivity, projectivity and the axiom of choice, Blass, A. 1979, Trans. Amer. Math. Soc. |
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement |
|---|---|
| 193: | \(EFP\ Ab\): Every Abelian group is a homomorphic image of a free projective Abelian group. |
| 188: | \(EP\ Ab\): For every Abelian group \(A\) there is a projective Abelian group \(G\) and a homomorphism from \(G\) onto \(A\). |
| 106: | Baire Category Theorem for Compact Hausdorff Spaces: Every compact Hausdorff space is Baire. |
| 126: | \(MC(\aleph_0,\infty)\), Countable axiom of multiple choice: For every denumerable set \(X\) of non-empty sets there is a function \(f\) such that for all \(y\in X\), \(f(y)\) is a non-empty finite subset of \(y\). |
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