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src/ZF/ex/TF.thy
changeset 11316 b4e71bd751e4
parent 6112 5e4871c5136b
child 11354 9b80fe19407f 
--- a/src/ZF/ex/TF.thy	Mon May 21 14:35:54 2001 +0200
+++ b/src/ZF/ex/TF.thy	Mon May 21 14:36:24 2001 +0200
@@ -11,9 +11,9 @@
   tree, forest, tree_forest    :: i=>i
 
 datatype
-  "tree(A)"   = Tcons ("a: A",  "f: forest(A)")
+  "tree(A)"   = Tcons ("a \\<in> A",  "f \\<in> forest(A)")
 and
-  "forest(A)" = Fnil  |  Fcons ("t: tree(A)",  "f: forest(A)")
+  "forest(A)" = Fnil  |  Fcons ("t \\<in> tree(A)",  "f \\<in> forest(A)")
 
 
 consts
isabelle