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src/HOL/AxClasses/Tutorial/Xor.thy
author wenzelm
Fri, 01 Sep 1995 14:27:36 +0200
changeset 1247 18b1441fb603
child 2907 0e272e4c7cb2
permissions -rw-r--r--
Various axiomatic type class demos;
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(*  Title:      HOL/AxClasses/Tutorial/Xor.thy
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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Define overloaded constants "<*>", "inv", "1" on type "bool".













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*)













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Xor = Group +













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defs













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  prod_bool_def "x <*> y == x ~= (y::bool)"













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  inv_bool_def  "inv x   == x::bool"













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  unit_bool_def "1       == False"













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end















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