doc-src/Intro/gate.thy
author nipkow
Mon, 19 Feb 1996 18:04:41 +0100
changeset 1515 4ed79ebab64d
parent 105 216d6ed87399
permissions -rw-r--r--
Introduced normalize_thm into HOL.ML Corrected some dependencies among Sum, Prod and mono. Extended RelPow

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