Proof of `Outerplanar graphs are planar`
groundedproofs/Lax68Proofs/Relationships.lean · lax-68
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
An outerplane drawing is, after forgetting its boundary condition, a planar drawing.