doc-src/Tutorial/Misc/Tree.thy
author wenzelm
Tue, 19 Feb 2002 23:49:26 +0100
changeset 12900 2be514a36aec
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Paulson:1989;

Tree = Main +
datatype 'a tree = Tip | Node ('a tree) 'a ('a tree)
end