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doc-src/Tutorial/Misc/NatSum.thy
author
paulson
Thu, 17 Aug 2000 11:56:47 +0200
changeset 9634
61b57cc1cb5a
parent 5377
efb799c5ed3c
permissions
-rw-r--r--
modified proofs: better rules for cancellation of common factors across comparisons
NatSum = Main +
consts sum :: nat => nat
primrec
"sum 0 = 0"
"sum (Suc n) = Suc n + sum n"
end