proposition: Lemma ren_closed_G Gamma gamma delta: G Gamma gamma -> G Gamma (gamma >> ren delta).
proof: Proof. intros H x A E. eapply ren_closed_E, H, E. Qed.
imports: Morphisms Lia Undecidability.HOU(std.std) Undecidability.HOU.calculus(prelim terms syntax semantics confluence typing order)