In mathematics, Teichmüller–Tukey lemma (sometimes named just Tukey's lemma, also known in certain circles as Tuki-Tuki lemma), named after John Tukey and Oswald Teichmüller, states that every nonempty collection of finite character has a maximal element with respect to inclusion. It is equivalent to the Axiom of Choice.
- Brillinger, David R. "John Wilder Tukey" 
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