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src/HOL/AxClasses/Semigroups.thy
author paulson
Sun, 15 Feb 2004 10:46:37 +0100
changeset 14387 e96d5c42c4b0
parent 12338 de0f4a63baa5
child 14981 e73f8140af78
permissions -rw-r--r--
Polymorphic treatment of binary arithmetic using axclasses
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(*  Title:      HOL/AxClasses/Semigroups.thy
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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*)
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theory Semigroups = Main:













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consts













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













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axclass semigroup < type








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  assoc: "(x [*] y) [*] z = x [*] (y [*] z)"













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consts













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  plus :: "'a => 'a => 'a"    (infixl "[+]" 70)













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axclass plus_semigroup < type








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  assoc: "(x [+] y) [+] z = x [+] (y [+] z)"













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end















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