proposition: Fact ra_rel_fix_zero : [| ra_zero |] = s_zero.
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