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src/CCL/Gfp.thy
author paulson
Fri, 11 Dec 1998 10:34:03 +0100
changeset 6021 4a3fc834288e
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permissions -rw-r--r--
new Close_locale synatx
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(*  Title:      HOL/gfp.thy
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    ID:         $Id$
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    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
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    Copyright   1992  University of Cambridge
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Greatest fixed points













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*)













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Gfp = Lfp +













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consts gfp :: "['a set=>'a set] => 'a set"













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rules













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 (*greatest fixed point*)













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 gfp_def "gfp(f) == Union({u. u <= f(u)})"













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end















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