From: Cristian Armentano <??>
Date: Sun, 9 Sep 2007 13:45:27 +0000 (+0000)
Subject: other simplifications.
X-Git-Tag: 0.4.95@7852~184
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=a7658504ad03494fbc78b3112e3355bfcb760f3f;p=helm.git

other simplifications.
---

diff --git a/matita/library/nat/gcd_properties1.ma b/matita/library/nat/gcd_properties1.ma
index ad5cb2c6b..94aa67670 100644
--- a/matita/library/nat/gcd_properties1.ma
+++ b/matita/library/nat/gcd_properties1.ma
@@ -256,7 +256,7 @@ apply (nat_case1 a)
 [ intros.
   apply (nat_case1 b)
   [ intros.
-    cut (d = O)
+    cut (d = O) (*this is an impossible case*)
     [ rewrite > Hcut.
       simplify.
       apply divides_SO_n