proposition: Fact ra_rel_fix_cst i : [| ra_cst i |] = s_cst i.
proof: Proof. reflexivity. Qed.
imports: Arith Lia List Bool Eqdep_dec Undecidability.Shared.Libs.DLW(utils_tac utils_nat utils_list finite pos vec) Undecidability.MuRec.MuRec