diff options
| author | letouzey | 2003-09-05 13:43:43 +0000 |
|---|---|---|
| committer | letouzey | 2003-09-05 13:43:43 +0000 |
| commit | afda8af89cd10a31419da859ff136fd1c4c0fa22 (patch) | |
| tree | a7774fe054c7f556204d35a2f7113dc9b96195da | |
| parent | cefe8d9e1acc211a505808703dda93acac050ced (diff) | |
Zabs_Zsgn
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@4307 85f007b7-540e-0410-9357-904b9bb8a0f7
| -rw-r--r-- | theories/ZArith/zarith_aux.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/theories/ZArith/zarith_aux.v b/theories/ZArith/zarith_aux.v index 936468fef7..81c87f7c1d 100644 --- a/theories/ZArith/zarith_aux.v +++ b/theories/ZArith/zarith_aux.v @@ -77,9 +77,9 @@ Proof. Destruct x;Intros;Rewrite Zmult_sym;Auto with arith. Qed. -Lemma Zabs_Zsgn: (x:Z)(Zabs x)=(Zmult (Zsgn x) x). +Lemma Zabs_Zsgn: (x:Z)(Zmult (Zabs x) (Zsgn x))=x. Proof. -Destruct x;Intros;Auto with arith. +Destruct x;Intros; Rewrite Zmult_sym; Auto with arith. Qed. (** From [nat] to [Z] *) |