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doc-src/Tutorial/Recdef/ack
author paulson
Fri, 13 Jul 2001 11:31:05 +0200
changeset 11414 5e1e952002e5
parent 9255 2ceb11a2e190
permissions -rw-r--r--
index file

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