Lax Lean Archive

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

Proof of `Ladders are planar`

conditional — 1 open assumptionproofs/Lax68Proofs/Relationships.lean · lax-68

What this proof establishes

thm×Lax68.LadderPlanar

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 ladder is planar.