diff options
Diffstat (limited to 'theories/ZArith')
| -rw-r--r-- | theories/ZArith/Zpow_facts.v | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/theories/ZArith/Zpow_facts.v b/theories/ZArith/Zpow_facts.v index 9524bd44f..8f86fdf79 100644 --- a/theories/ZArith/Zpow_facts.v +++ b/theories/ZArith/Zpow_facts.v @@ -171,6 +171,7 @@ Qed. Theorem Zpower_ge_0: forall x y, 0 <= x -> 0 <= x^y. Proof. intros x y; case y; auto with zarith. + simpl ; auto with zarith. intros p H1; assert (H: 0 <= Zpos p); auto with zarith. generalize H; pattern (Zpos p); apply natlike_ind; auto with zarith. intros p1 H2 H3 _; unfold Zsucc; rewrite Zpower_exp; simpl; auto with zarith. |