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doc-src/Tutorial/Ifexpr/normal
author paulson
Fri, 03 Nov 2000 18:33:57 +0100
changeset 10375 d943898cc3a9
parent 5377 efb799c5ed3c
permissions -rw-r--r--
new lemma card_Diff2_less for mulilated chess board
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consts normal :: ifex => bool
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primrec
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"normal(CIF b) = True"
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"normal(VIF x) = True"
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"normal(IF b t e) = (normal t & normal e &
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      (case b of CIF b => True | VIF x => True | IF x y z => False))"
isabelle