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doc-src/Intro/gate.thy
author krauss
Tue, 02 Aug 2011 11:52:57 +0200
changeset 44014 88bd7d74a2c1
parent 105 216d6ed87399
permissions -rw-r--r--
moved recursion combinator to HOL/Library/Wfrec.thy -- it is so fundamental and well-known that it should survive recdef
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Gate = FOL +
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consts  nand,xor :: "[o,o] => o"
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rules   nand_def "nand(P,Q) == ~(P & Q)"
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        xor_def  "xor(P,Q)  == P & ~Q | ~P & Q"
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end
isabelle