Reply to sibling - lean4 doesn't rest on ZF or ZFC. https://lean-lang.org/theore... | Hacker News

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lanstin 18 days ago | parent | context | favorite | on: Formalizing Fermat's Last Theorem

Reply to sibling - lean4 doesn't rest on ZF or ZFC. https://lean-lang.org/theorem_proving_in_lean4/Axioms-and-Co... However I believe an equivalence of power has been shown between the two.

mietek 18 days ago [–]

Roughly, yes. See B. Werner (1997) “Sets in types, types in sets”.

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