proposition: Lemma mapTape_move_left t : tape_move_left (mapTape t) = mapTape (tape_move_left t).
proof: Proof. destruct t; cbn; auto. destruct l; cbn; auto. Qed.
imports: Undecidability.Shared.Libs.PSL.Vectors.Vectors Undecidability.TM.TM