Proof of `Exactly one of four relations for graph parameters`
groundedproofs/Lax825442Proofs/RelationClassification.lean · lax-825442
What this proof establishes
no assumptions
Assuming the claims on the left, the claim on the right holds — checked by the archive's pipeline. Proof code is not displayed here.
Description
Classical propositional logic gives exhaustiveness and excludes every pair of simultaneous cases after unfolding the four relations.