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doc-src/Tutorial/Misc/Ackermann.thy
author wenzelm
Mon, 09 Nov 1998 11:20:07 +0100
changeset 5814 a3881c1f1d3c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
isabelle -I;
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Ackermann = WF_Rel +
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consts ack :: "nat * nat => nat"
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recdef ack "measure(%m. m) ** 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))"
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end
isabelle