proposition: Fact ra_eq_prim_rec : prim_rec ra_eq.
proof: Proof. apply prim_rec_bool_spec; auto. Qed.
imports: Arith List Lia Undecidability.Shared.Libs.DLW(utils_tac utils_nat utils_list gcd crt sums finite pos vec) Undecidability.MuRec.Util(recalg recomp prim_min)