diff -r 8dab8d82f26b -r 070161f1996a IntEx2.thy
--- a/IntEx2.thy	Sun Dec 06 11:21:29 2009 +0100
+++ b/IntEx2.thy	Sun Dec 06 11:39:34 2009 +0100
@@ -6,6 +6,7 @@
   ("Tools/int_arith.ML")
 begin
 
+
 fun
   intrel :: "(nat \<times> nat) \<Rightarrow> (nat \<times> nat) \<Rightarrow> bool" (infix "\<approx>" 50)
 where