src/HOL/Rat.thy

--- a/src/HOL/Rat.thy	Thu May 27 13:13:30 2010 +0200
+++ b/src/HOL/Rat.thy	Thu May 27 15:15:20 2010 +0200
@@ -1203,4 +1203,7 @@
 lemma "123.456 = -111.111 + 200 + 30 + 4 + 5/10 + 6/100 + (7/1000::rat)"
 by simp
 
+
+hide_const (open) normalize
+
 end