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doc-src/Tutorial/Misc/NatSum.thy
author oheimb
Thu, 15 Feb 2001 15:56:51 +0100
changeset 11132 09622301ca07
parent 5377 efb799c5ed3c
permissions -rw-r--r--
added trial proof
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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