proposition: Lemma degree_exp_wrt_exp_S : forall n1 e1, degree_exp_wrt_exp n1 e1 -> degree_exp_wrt_exp (S n1) e1.
proof: Proof. pose proof degree_exp_wrt_exp_S_mutual as H; intuition eauto. Qed.
imports: Coq.Logic.FunctionalExtensionality Coq.Program.Equality Metalib.Metatheory Metalib.LibLNgen Stlc