diff options
Diffstat (limited to 'theories/QArith/Qreals.v')
| -rw-r--r-- | theories/QArith/Qreals.v | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/theories/QArith/Qreals.v b/theories/QArith/Qreals.v index 4a826f691..f363fd7c2 100644 --- a/theories/QArith/Qreals.v +++ b/theories/QArith/Qreals.v @@ -167,14 +167,13 @@ Qed. Lemma Q2R_inv : forall x : Q, ~ x==0 -> Q2R (/x) = (/ Q2R x)%R. Proof. -unfold Qinv, Q2R, Qeq; intros (x1, x2); unfold Qden, Qnum. -case x1. +unfold Qinv, Q2R, Qeq; intros (x1, x2). case x1; unfold Qnum, Qden. simpl; intros; elim H; trivial. -intros; field; auto. +intros; field; auto. intros; change (IZR (Zneg x2)) with (- IZR (' x2))%R; change (IZR (Zneg p)) with (- IZR (' p))%R; - field; (*auto 8 with real.*) + simpl; field; (*auto 8 with real.*) repeat split; auto; auto with real. Qed. |