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doc-src/Tutorial/Misc/Tree.thy
author
wenzelm
Tue, 20 Oct 1998 16:19:53 +0200
changeset 5681
464913c6086a
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
added foldl, keys;
Tree = Main +
datatype 'a tree = Tip | Node ('a tree) 'a ('a tree)
end