diff -r d68b705719ce -r 6b780867d426 src/ZF/UNITY/State.thy
--- a/src/ZF/UNITY/State.thy	Wed Dec 30 17:38:57 2015 +0100
+++ b/src/ZF/UNITY/State.thy	Wed Dec 30 17:45:18 2015 +0100
@@ -21,7 +21,7 @@
   default_val :: "i=>i"
 
 definition
-  "state == \<Pi> x \<in> var. cons(default_val(x), type_of(x))"
+  "state == \<Prod>x \<in> var. cons(default_val(x), type_of(x))"
 
 definition
   "st0 == \<lambda>x \<in> var. default_val(x)"