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doc-src/Tutorial/Recdef/ack
author nipkow
Wed, 11 Feb 2004 01:26:15 +0100
changeset 14381 1189a8212a12
parent 9255 2ceb11a2e190
permissions -rw-r--r--
Modified UN and INT xsymbol syntax: made index subscript

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