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doc-src/Tutorial/Misc/GCD.thy
author wenzelm
Fri, 21 Dec 2001 23:16:17 +0100
changeset 12587 3f3d2ffb5df5
parent 5377 efb799c5ed3c
permissions -rw-r--r--
HOL/record: shared operations ("more", "fields", etc.) now need to be always qualified;
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GCD = WF_Rel +
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consts gcd :: "nat*nat => nat"
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recdef gcd "measure ((%(m,n).n))"
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  simpset "simpset() addsimps [mod_less_divisor]"
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    "gcd (m, n) = (if n=0 then m else gcd(n, m mod n))"
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end
isabelle