--- a/src/HOL/Real/Hyperreal/HyperDef.thy Fri Dec 01 19:42:05 2000 +0100
+++ b/src/HOL/Real/Hyperreal/HyperDef.thy Fri Dec 01 19:42:35 2000 +0100
@@ -9,7 +9,7 @@
consts
- FreeUltrafilterNat :: nat set set
+ FreeUltrafilterNat :: nat set set ("\\<U>")
defs