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doc-src/Intro/gate.thy
author wenzelm
Thu, 24 Jun 2010 14:31:01 +0200
changeset 37528 42804fb5dd92
parent 105 216d6ed87399
permissions -rw-r--r--
slightly more standard data merge: Symtax.merge (K true) avoids equality on abstract type Pretty.T and gracefully accepts overriding, Symtab.join prefers first entry as usual;
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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