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doc-src/Tutorial/Misc/natsum
author wenzelm
Wed, 13 Oct 1999 19:44:15 +0200
changeset 7858 2cd88d1eec0c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
isabelle-isar-ref;

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