Proof of `Stars are planar`

groundedproofs/Lax303502Proofs/Stars.lean · lax-303502

What this proof establishes

no assumptions

thm✓Lax68.StarPlanar

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

Description

Every finite star is planar.

Proof strategy

Use the explicit circle drawing from $star_outerplanar$ and retain its straight-line drawing certificate.

Attribution

Immediate consequence of the circle construction in this submission.