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doc-src/Tutorial/Misc/NatSum.thy
author wenzelm
Mon, 03 Dec 2001 20:59:57 +0100
changeset 12344 7237c6497cb1
parent 5377 efb799c5ed3c
permissions -rw-r--r--
use \<zero>, \<one>;

NatSum = Main +
consts sum :: nat => nat
primrec
"sum 0 = 0"
"sum (Suc n) = Suc n + sum n"
end
isabelle