diff options
| -rw-r--r-- | mathcomp/algebra/ssralg.v | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mathcomp/algebra/ssralg.v b/mathcomp/algebra/ssralg.v index 8ae63b8..859bb1d 100644 --- a/mathcomp/algebra/ssralg.v +++ b/mathcomp/algebra/ssralg.v @@ -735,7 +735,7 @@ Proof. by move=> x y; rewrite -[y in LHS]opprK opprB addrC. Qed. Lemma addrKA z x y : (x + z) - (z + y) = x - y. Proof. by rewrite opprD addrA addrK. Qed. -Lemma subrKA z x y : (x - z) + (z - y) = x - y. +Lemma subrKA z x y : (x - z) + (z + y) = x + y. Proof. by rewrite addrA addrNK. Qed. Lemma subr0_eq x y : x - y = 0 -> x = y. |