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doc-src/Tutorial/Recdef/ack
author kleing
Mon, 29 Mar 2004 10:17:35 +0200
changeset 14493 216179c782a6
parent 9255 2ceb11a2e190
permissions -rw-r--r--
include exercises again

consts ack :: "nat*nat => nat"
recdef ack "measure(%m. m) <*lex*> measure(%n. n)"
  "ack(0,n)         = Suc n"
  "ack(Suc m,0)     = ack(m, 1)"
  "ack(Suc m,Suc n) = ack(m,ack(Suc m,n))"
isabelle