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doc-src/Tutorial/Misc/NatSum.thy
author wenzelm
Fri, 05 May 2000 22:24:47 +0200
changeset 8811 6ec0c8f9d68d
parent 5377 efb799c5ed3c
permissions -rw-r--r--
improved syntax of method options (no_asm) etc;

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