proposition: Lemma R_of_Q0 (R : unitRingType) : R_of_Q 0 = 0 :> R.
proof: Proof. by rewrite /R_of_Q mul0r. Qed.
imports: elpi(elpi) Coq(QArith) Coq.micromega(OrderedRing RingMicromega) mathcomp(all_ssreflect ssralg ssrnum ssrint) mathcomp.zify(ssrZ zify)