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src/HOL/AxClasses/Tutorial/Xor.thy
author paulson
Fri, 29 Mar 1996 10:54:44 +0100
changeset 1629 b5e43a60443a
parent 1247 18b1441fb603
child 2907 0e272e4c7cb2
permissions -rw-r--r--
Mended indentation

(*  Title:      HOL/AxClasses/Tutorial/Xor.thy
    ID:         $Id$
    Author:     Markus Wenzel, TU Muenchen

Define overloaded constants "<*>", "inv", "1" on type "bool".
*)

Xor = Group +

defs
  prod_bool_def "x <*> y == x ~= (y::bool)"
  inv_bool_def  "inv x   == x::bool"
  unit_bool_def "1       == False"

end
isabelle