diff options
Diffstat (limited to 'theories/Reals/Sqrt_reg.v')
| -rw-r--r-- | theories/Reals/Sqrt_reg.v | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/theories/Reals/Sqrt_reg.v b/theories/Reals/Sqrt_reg.v index ff0a72e8..13be46da 100644 --- a/theories/Reals/Sqrt_reg.v +++ b/theories/Reals/Sqrt_reg.v @@ -6,12 +6,13 @@ (* * GNU Lesser General Public License Version 2.1 *) (************************************************************************) -(*i $Id: Sqrt_reg.v 9245 2006-10-17 12:53:34Z notin $ i*) +(*i $Id: Sqrt_reg.v 10710 2008-03-23 09:24:09Z herbelin $ i*) Require Import Rbase. Require Import Rfunctions. Require Import Ranalysis1. -Require Import R_sqrt. Open Local Scope R_scope. +Require Import R_sqrt. +Open Local Scope R_scope. (**********) Lemma sqrt_var_maj : @@ -309,7 +310,7 @@ Qed. Lemma derivable_pt_sqrt : forall x:R, 0 < x -> derivable_pt sqrt x. Proof. unfold derivable_pt in |- *; intros. - apply existT with (/ (2 * sqrt x)). + exists (/ (2 * sqrt x)). apply derivable_pt_lim_sqrt; assumption. Qed. |