proposition: Fact GammaUSn {n} : GammaU (S n) = GammaU n ++ [Ut (poly_num (1+n))].
proof: Proof. by rewrite /GammaU (ltac:(lia) : 1 + S n = (S n) + 1) [seq _ (S n + 1)]seq_app map_app. Qed.
imports: PeanoNat List Lia Undecidability.SystemF.SysF Undecidability.SystemF.Autosubst.syntax Undecidability.SystemF.Util(Facts poly_type_facts term_facts typing_facts iipc2_facts sn_facts) Undecidability.DiophantineConstraints.H10C ssreflect ssrbool ssrfun