doc-src/Tutorial/Misc/Tree.thy
author wenzelm
Thu, 03 Aug 2000 00:44:08 +0200
changeset 9505 09c75c801dde
parent 5377 efb799c5ed3c
permissions -rw-r--r--
improved output of space symbol;

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