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src/HOL/AxClasses/Tutorial/Semigroup.thy
author wenzelm
Mon, 29 Nov 1999 15:52:49 +0100
changeset 8039 a901bafe4578
parent 1247 18b1441fb603
permissions -rw-r--r--
Goal: tuned pris;
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(*  Title:      HOL/AxClasses/Tutorial/Semigroup.thy
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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Define class "semigroup".













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*)













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Semigroup = HOL +













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consts













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  "<*>"         :: "['a, 'a] => 'a"             (infixl 70)













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axclass













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  semigroup < term













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  assoc         "(x <*> y) <*> z = x <*> (y <*> z)"













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end















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