Lax Lean Archive

Proof of `The Immerman–Szelepcsényi theorem`

groundedproofs/Lax362205Proofs/Complement.lean · lax-362205

What this proof establishes

thm✓Lax362205.NLcoNL

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

In the paper

  • page 3 of this submission's paper

Description

Apply complement closure in both directions and use double complementation.