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importantSYS.SOURCE: CFSG in Lean• 2026-10-27T16:29:02Z

Formalization of the Classification of Finite Simple Groups in Lean

#formal verification#group theory#lean theorem prover

The Classification of Finite Simple Groups has been formally verified in the Lean theorem prover, with a discovered flaw in the Unbalanced Group Theorem resolved through an alternative proof using Solomon's 1976 theory. This achievement represents a major milestone in formalizing complex mathematical proofs and correcting historical mathematical literature.

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