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- Thread starter Dragonfall
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CRGreathouse

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- Axiom of Extensionality (ax-ext)
- Axiom of Separation (ax-sep)
- Null Set Axiom (ax-nul)
- Axiom of Power Sets (ax-pow)
- Axiom of Pairing (ax-pr)
- Axiom of Union (ax-un)

* Propositional calculus (ax-1, ax-2, ax-3, ax-mp), basic predicate calculus (ax-4, ax-5, ax-6, ax-7, ax-gen), the equality and substitution rules (ax-8, ax-9, ax-10, ax-11, ax-12, ax-13, ax-14), and the second Axiom of Quantifier Introduction (ax-17).

** The page also lists the Axiom of Distinct Variables (ax-16) and the old Axiom of Variable Substitution (ax-11o), but these have been proven redundant with the others.

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Fascinating. Thanks.

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