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doc-src/Tutorial/Misc/Tree.thy
author
aspinall
Tue, 16 Nov 2004 20:20:14 +0100
changeset 15289
1d2dba93ef08
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
Markup obtain as introducing a nested goal.
Tree = Main +
datatype 'a tree = Tip | Node ('a tree) 'a ('a tree)
end