doc-src/Tutorial/Misc/Tree.thy
author wenzelm
Wed, 06 Oct 1999 18:50:40 +0200
changeset 7760 43f8d28dbc6e
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Isar_examples/W_correct;

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