diff options
Diffstat (limited to 'theories/ZArith/Zwf.v')
| -rw-r--r-- | theories/ZArith/Zwf.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/ZArith/Zwf.v b/theories/ZArith/Zwf.v index 0a4418671..6f005d01d 100644 --- a/theories/ZArith/Zwf.v +++ b/theories/ZArith/Zwf.v @@ -32,13 +32,13 @@ Section wf_proof. Let f (z:Z) := Z.abs_nat (z - c). Lemma Zwf_well_founded : well_founded (Zwf c). - red in |- *; intros. + red; intros. assert (forall (n:nat) (a:Z), (f a < n)%nat \/ a < c -> Acc (Zwf c) a). clear a; simple induction n; intros. (** n= 0 *) case H; intros. case (lt_n_O (f a)); auto. - apply Acc_intro; unfold Zwf in |- *; intros. + apply Acc_intro; unfold Zwf; intros. assert False; omega || contradiction. (** inductive case *) case H0; clear H0; intro; auto. |