diff options
| -rw-r--r-- | theories/ZArith/Zabs.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/ZArith/Zabs.v b/theories/ZArith/Zabs.v index 21086d9b61..f869e15023 100644 --- a/theories/ZArith/Zabs.v +++ b/theories/ZArith/Zabs.v @@ -49,12 +49,12 @@ Qed. Theorem Zabs_intro : forall P (n:Z), P (- n) -> P n -> P (Z.abs n). Proof. - now destruct n. + intros P n; now destruct n. Qed. Definition Zabs_dec : forall x:Z, {x = Z.abs x} + {x = - Z.abs x}. Proof. - destruct x; auto. + intros x; destruct x; auto. Defined. Lemma Zabs_spec x : |