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Diffstat (limited to 'src/Util/ZUtil')
| -rw-r--r-- | src/Util/ZUtil/Div.v | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/Util/ZUtil/Div.v b/src/Util/ZUtil/Div.v index d660a9935..c596dbab3 100644 --- a/src/Util/ZUtil/Div.v +++ b/src/Util/ZUtil/Div.v @@ -124,6 +124,9 @@ Module Z. Qed. Hint Rewrite div_add_exact using zutil_arith : zsimplify. + Lemma Z_divide_div_mul_exact' a b c : b <> 0 -> (b | a) -> a * c / b = c * (a / b). + Proof. intros. rewrite Z.mul_comm. auto using Z.divide_div_mul_exact. Qed. + Lemma div_sub_mod_exact a b : b <> 0 -> a / b = (a - a mod b) / b. Proof. intro. |