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doc-src/Tutorial/Recdef/ack
author paulson
Tue, 05 Dec 2000 18:56:18 +0100
changeset 10596 77951eaeb5b0
parent 9255 2ceb11a2e190
permissions -rw-r--r--
tidying

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