diff options
| author | letouzey | 2006-04-25 22:39:38 +0000 |
|---|---|---|
| committer | letouzey | 2006-04-25 22:39:38 +0000 |
| commit | 0274e797162cd62fe9145436a66027a61d727d64 (patch) | |
| tree | 5299d7691fe5e585366b8ea2bf1d2e0cb806714d | |
| parent | abbd91d804a4baea4b16ad9a00485f3743d2340f (diff) | |
un lemme de double inclusion
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@8732 85f007b7-540e-0410-9357-904b9bb8a0f7
| -rw-r--r-- | theories/FSets/FSetProperties.v | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/theories/FSets/FSetProperties.v b/theories/FSets/FSetProperties.v index 4aeda775c7..4d8a78a14b 100644 --- a/theories/FSets/FSetProperties.v +++ b/theories/FSets/FSetProperties.v @@ -154,6 +154,11 @@ Module Properties (M: S). Proof. unfold Subset; intuition. Qed. + + Lemma double_inclusion : s1[=]s2 <-> s1[<=]s2 /\ s2[<=]s1. + Proof. + unfold Subset, Equal; split; intros; intuition; generalize (H a); intuition. + Qed. (** properties of [empty] *) |