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doc-src/Tutorial/Misc/natsum
changeset 5377 efb799c5ed3c
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5376:60b31a24f1a6 5377:efb799c5ed3c 
       
     1 consts sum :: nat => nat
 
       
     2 primrec
 
       
     3 "sum 0 = 0"
 
       
     4 "sum (Suc n) = Suc n + sum n"
isabelle