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References to 'choice function'
1. axiom of choice by GrafZahl
2. axiom of countable choice by yark
3. axiom of dependent choices by CWoo
4. circular reasoning by Wkbj79
5. equivalence of Zorn's lemma and the axiom of choice by Henry
6. one-to-one function from onto function by mathcam
7. product of non-empty set of non-empty sets is non-empty by CWoo
8. proof of downward Lowenheim-Skolem theorem by GodelsTheorem
9. proof of Zermelo's postulate by Wkbj79
10. proof of Zermelo's well-ordering theorem by Henry
11. proof that a relation is union of functions if and only if AC by ratboy
12. selector by porton
13. surjection and axiom of choice by CWoo
14. variations on axiom of choice by CWoo
15. well-ordering principle implies axiom of choice by Wkbj79