Lax Lean Archive

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

Proof of `Semantics and definability in FO(LFP)`

groundedproofs/Lax979537Proofs/Positivity.lean · lax-979537

What this proof establishes

no assumptions

def✓Lax979537.FixedPointSemantics

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