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doc-src/Tutorial/Misc/NatSum.thy
author wenzelm
Thu, 14 Dec 2000 19:36:48 +0100
changeset 10671 ac6b3b671198
parent 5377 efb799c5ed3c
permissions -rw-r--r--
added Summation;

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