doc-src/Intro/gate2.thy
author aspinall
Sun Dec 31 15:34:21 2006 +0100 (2006-12-31)
changeset 21973 e7c9b0d3ce82
parent 105 216d6ed87399
permissions -rw-r--r--
Quote arguments in PGIP exceptions. Tune comment.
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Gate2 = FOL +
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consts  "~&"     :: "[o,o] => o" (infixl 35)
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        "#"      :: "[o,o] => o" (infixl 30)
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        If       :: "[o,o,o] => o"       ("if _ then _ else _")
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rules   nand_def "P ~& Q == ~(P & Q)"    
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        xor_def  "P # Q  == P & ~Q | ~P & Q"
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        If_def   "if P then Q else R == P&Q | ~P&R"
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end