proposition: Lemma ScS_idSub_right {Γ Γ'} (σ : Sub Γ Γ') : ScS σ idSub = σ.
proof: Proof. induction σ; simpl; auto. rewrite IHσ. now rewrite SubExp_idSub. Qed.
imports: Coq.Lists.List Category.Lib Category.Instance.Lambda.Exp Category.Instance.Lambda.Value Category.Instance.Lambda.Ren Equations(Equations)