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src/HOLCF/Cprod.thy
changeset 27310 d0229bc6c461
parent 26962 c8b20f615d6c
child 27413 3154f3765cc7 
--- a/src/HOLCF/Cprod.thy	Fri Jun 20 22:51:50 2008 +0200
+++ b/src/HOLCF/Cprod.thy	Fri Jun 20 23:01:09 2008 +0200
@@ -351,7 +351,7 @@
 
 instance proof
   fix i :: nat and x :: "'a \<times> 'b"
-  show "chain (\<lambda>i. approx i\<cdot>x)"
+  show "chain (approx :: nat \<Rightarrow> 'a \<times> 'b \<rightarrow> 'a \<times> 'b)"
     unfolding approx_cprod_def by simp
   show "(\<Squnion>i. approx i\<cdot>x) = x"
     unfolding approx_cprod_def
isabelle