A formal consistency proof of Quine's set theory New Foundations
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Updated
Feb 25, 2026 - Lean
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new-foundations
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A Lean 4 formalization of Quine's New Foundations, computationally proving the breakdown of structural proof normalization via extensionality collisions.
parsing graph-algorithms repl theorem-proving type-theory set-theory quine lean formal-verification stratification sequent-calculus formal-logic proof-theory lean4 new-foundations
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Updated
Apr 22, 2026 - Lean
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