proposition: Lemma enc_subst sigma n s: sigma • enc n s = enc n (sigma • s).
proof: Proof. unfold enc; asimpl; now rewrite repeated_map. Qed.
imports: RelationClasses Morphisms List Lia Init.Nat Setoid Undecidability.HOU(calculus.calculus second_order.diophantine_equations systemunification nth_order_unification)