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doc-src/Tutorial/Recdef/ack
author wenzelm
Thu, 19 Oct 2000 21:21:20 +0200
changeset 10274 130ff5eb2b80
parent 9255 2ceb11a2e190
permissions -rw-r--r--
added Tools/induct_attrib.ML;

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