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doc-src/Tutorial/Misc/NatSum.thy
author berghofe
Fri, 16 Jul 1999 12:14:04 +0200
changeset 7015 85be09eb136c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
- Datatype package now also supports arbitrarily branching datatypes (using function types). - Added new simplification procedure for proving distinctness of constructors. - dtK is now a reference.
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NatSum = Main +
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consts sum :: nat => nat
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primrec
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"sum 0 = 0"
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"sum (Suc n) = Suc n + sum n"
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end
isabelle