src/HOL/ex/IntRingDefs.thy
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Fri, 11 Sep 1998 16:25:40 +0200
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(*  Title:      HOL/Integ/IntRingDefs.thy
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    ID:         $Id$
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    Author:     Tobias Nipkow and Markus Wenzel
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    Copyright   1996 TU Muenchen
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Provides the basic defs and thms for showing that int is a commutative ring.
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Most of it has been defined and shown already.
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*)
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IntRingDefs = Integ + Ring +
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instance int :: zero
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defs zero_int_def "zero::int == $# 0"
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end