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doc-src/Tutorial/Recdef/ack
author berghofe
Wed, 10 Jul 2002 18:39:15 +0200
changeset 13342 915d4d004643
parent 9255 2ceb11a2e190
permissions -rw-r--r--
expand_proof now also takes an optional term describing the proposition of the theorem to be expanded (to avoid problems with different theorems having the same names).
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consts ack :: "nat*nat => nat"
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recdef ack "measure(%m. m) <*lex*> measure(%n. n)"
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  "ack(0,n)         = Suc n"
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  "ack(Suc m,0)     = ack(m, 1)"
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  "ack(Suc m,Suc n) = ack(m,ack(Suc m,n))"
isabelle