diff options
Diffstat (limited to 'theories/NArith')
| -rw-r--r-- | theories/NArith/Nnat.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/NArith/Nnat.v b/theories/NArith/Nnat.v index 94242394b..6551f6c10 100644 --- a/theories/NArith/Nnat.v +++ b/theories/NArith/Nnat.v @@ -84,8 +84,8 @@ Qed. Lemma inj_div2 a : N.to_nat (N.div2 a) = Nat.div2 (N.to_nat a). Proof. destruct a as [|[p|p| ]]; trivial. - - simpl N.to_nat. now rewrite Pos2Nat.inj_xI, Nat.div2_succ_double. - - simpl N.to_nat. now rewrite Pos2Nat.inj_xO, Nat.div2_double. + - unfold N.div2, N.to_nat. now rewrite Pos2Nat.inj_xI, Nat.div2_succ_double. + - unfold N.div2, N.to_nat. now rewrite Pos2Nat.inj_xO, Nat.div2_double. Qed. Lemma inj_compare a a' : |