Lax Lean Archive

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

Proof of `Hind–Oellermann deletion–contraction theorem`

groundedproofs/Lax17Proofs/Exposed.lean · lax-17

What this proof establishes

thm✓Lax17.HindOellermann

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

Hind–Oellermann deletion–contraction for terminal element connectivity.