From: Cristian Armentano <??>
Date: Sun, 9 Sep 2007 13:45:27 +0000 (+0000)
Subject: other simplifications.
X-Git-Tag: make_still_working~6033
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=e87790d57d1aa994218b509f917da1519e509ce6;p=helm.git

other simplifications.
---

diff --git a/helm/software/matita/library/nat/gcd_properties1.ma b/helm/software/matita/library/nat/gcd_properties1.ma
index ad5cb2c6b..94aa67670 100644
--- a/helm/software/matita/library/nat/gcd_properties1.ma
+++ b/helm/software/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