proposition: Lemma list_numerals_nodup n : NoDup (list_numerals n).
proof: Proof. apply FinFun.Injective_map_NoDup. - intros k k'. apply hfs_numeral_inj. - apply list_n_nodup. Qed.
imports: Undecidability.FOL(Syntax.Facts Semantics.Tarski.FullFacts) Undecidability.FOL(Sets.ZF) Undecidability.FOL(ZF) Undecidability.FOL.TRAKHTENBROT(hfs) Undecidability.Shared.Libs.DLW.Utils(finite) Undecidability(Shared.ListAutomation) Lia