Draft — mutable and not usable as a dependency; its citation marks the draft state.

Proof of `Büchi's theorem: regular languages are the MSO-definable ones`

groundedproofs/Lax314295Proofs/Results.lean · lax-314295

What this proof establishes

Assuming the claims on the left, the claim on the right holds — checked by the archive's pipeline. Proof code is not displayed here.

Read the Lean proof on GitHub

In the paper

Description

Büchi's theorem (Theorem C.4.1) as a biconditional, glued from its two halves taken as assumptions.