diff options
Diffstat (limited to 'theories/Reals/Machin.v')
| -rw-r--r-- | theories/Reals/Machin.v | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/theories/Reals/Machin.v b/theories/Reals/Machin.v index 19db476fd..2d2385703 100644 --- a/theories/Reals/Machin.v +++ b/theories/Reals/Machin.v @@ -53,7 +53,7 @@ assert (-(PI/4) <= atan x). destruct xm1 as [xm1 | xm1]. rewrite <- atan_1, <- atan_opp; apply Rlt_le, atan_increasing. assumption. - solve[rewrite <- xm1, atan_opp, atan_1; apply Rle_refl]. + solve[rewrite <- xm1; change (-1) with (-(1)); rewrite atan_opp, atan_1; apply Rle_refl]. assert (-(PI/4) < atan y). rewrite <- atan_1, <- atan_opp; apply atan_increasing. assumption. |