The source lists five familiar principles equivalent to the Axiom of Choice: Zorn’s Lemma, Tukey’s Lemma, the well-ordering principle, the Hausdorff maximality principle, and König’s Theorem.
- State the Axiom of Choice and any two of those five principles.
- Choose one of the five principles, call it \(P\), and prove either \[ \mathrm{AC}\Longrightarrow P \] or \[ P\Longrightarrow\mathrm{AC}. \]