proposition: Lemma Acz_standard : standard Acz_interp.
proof: Proof. intros s [n Hn]. cbn in Hn. exists n. apply Hn. Qed.
imports: Undecidability.FOL(Syntax.Facts Semantics.Tarski.FullFacts ZF) Undecidability.FOL.Sets(ZF binZF) Undecidability.FOL.Sets.Models(Aczel Aczel_CE Aczel_TD) Coq(Lia)