proposition: Lemma numeral_omega n : numeral n ∈ ω.
proof: Proof. Proof using M_ZF. induction n; cbn; now apply M_om1. 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)