diff options
Diffstat (limited to 'theories/QArith/Qreals.v')
| -rw-r--r-- | theories/QArith/Qreals.v | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/theories/QArith/Qreals.v b/theories/QArith/Qreals.v index f363fd7c2..8f827dab9 100644 --- a/theories/QArith/Qreals.v +++ b/theories/QArith/Qreals.v @@ -14,6 +14,7 @@ Require Export QArith_base. Definition Q2R (x : Q) : R := (IZR (Qnum x) * / IZR (QDen x))%R. Lemma IZR_nz : forall p : positive, IZR (Zpos p) <> 0%R. +Proof. intros; apply not_O_IZR; auto with qarith. Qed. @@ -162,6 +163,7 @@ field; auto. Qed. Lemma Q2R_minus : forall x y : Q, Q2R (x-y) = (Q2R x - Q2R y)%R. +Proof. unfold Qminus; intros; rewrite Q2R_plus; rewrite Q2R_opp; auto. Qed. |