diff options
Diffstat (limited to 'theories/Sets/Classical_sets.v')
| -rw-r--r-- | theories/Sets/Classical_sets.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/Sets/Classical_sets.v b/theories/Sets/Classical_sets.v index 62fd4df1a..5f6860997 100644 --- a/theories/Sets/Classical_sets.v +++ b/theories/Sets/Classical_sets.v @@ -56,7 +56,7 @@ Section Ensembles_classical. forall X Y:Ensemble U, Included U X Y -> ~ Included U Y X -> Inhabited U (Setminus U Y X). Proof. - intros X Y I NI. + intros X Y I NI. elim (not_all_ex_not U (fun x:U => In U Y x -> In U X x) NI). intros x YX. apply Inhabited_intro with x. @@ -78,7 +78,7 @@ Section Ensembles_classical. unfold Subtract at 1 in |- *; auto with sets. Qed. Hint Resolve Subtract_intro : sets. - + Lemma Subtract_inv : forall (A:Ensemble U) (x y:U), In U (Subtract U A x) y -> In U A y /\ x <> y. Proof. |