Add rewrite lemma for frac_op

ad0c229d · Zhen Zhang · f4b671c8 · ad0c229d
Commit ad0c229d authored 8 years ago by Zhen Zhang
--- a/algebra/frac.v
+++ b/algebra/frac.v
@@ -35,3 +35,6 @@ Global Instance frac_full_exclusive : Exclusive 1%Qp.
 Proof.
  move=> y /Qcle_not_lt [] /=. by rewrite -{1}(Qcplus_0_r 1) -Qcplus_lt_mono_l.
 Qed.
+
+Lemma frac_op': ∀ (p q: Qp), (p ⋅ q) = (p + q)%Qp.
+Proof. done. Qed.