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doc-src/Tutorial/Misc/Tree.thy
author
wenzelm
Mon, 03 Dec 2001 20:59:57 +0100
changeset 12344
7237c6497cb1
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
use \<zero>, \<one>;
Tree = Main +
datatype 'a tree = Tip | Node ('a tree) 'a ('a tree)
end