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doc-src/Intro/gate.thy
author huffman
Thu, 08 Jan 2009 10:43:09 -0800
changeset 29409 f0a8fe83bc07
parent 105 216d6ed87399
permissions -rw-r--r--
add lemma dvd_diff to class comm_ring_1

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