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doc-src/Intro/gate.thy
author paulson
Tue, 05 Sep 2000 13:12:00 +0200
changeset 9843 cc8aa63bdad6
parent 105 216d6ed87399
permissions -rw-r--r--
tidied, proving gcd_greatest_iff and using induct_tac

Gate = FOL +
consts  nand,xor :: "[o,o] => o"
rules   nand_def "nand(P,Q) == ~(P & Q)"
        xor_def  "xor(P,Q)  == P & ~Q | ~P & Q"
end
isabelle