diff options
Diffstat (limited to 'theories/FSets/FSetEqProperties.v')
| -rw-r--r-- | theories/FSets/FSetEqProperties.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/FSets/FSetEqProperties.v b/theories/FSets/FSetEqProperties.v index 5ff52495af..25187da6d2 100644 --- a/theories/FSets/FSetEqProperties.v +++ b/theories/FSets/FSetEqProperties.v @@ -496,9 +496,9 @@ Qed. (** Properties of [fold] *) Lemma exclusive_set : forall s s' x, - ~In x s\/~In x s' <-> mem x s && mem x s'=false. + ~(In x s/\In x s') <-> mem x s && mem x s'=false. Proof. -intros; do 2 rewrite not_mem_iff. +intros; do 2 rewrite mem_iff. destruct (mem x s); destruct (mem x s'); intuition. Qed. |