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src/CCL/Lfp.thy
author wenzelm
Mon, 25 Feb 2002 20:46:09 +0100
changeset 12936 84eb6c75cfe3
parent 1474 3f7d67927fe2
child 17456 bcf7544875b2
permissions -rw-r--r--
clarify module dependencies;
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(*  Title:      HOL/lfp.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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The Knaster-Tarski Theorem













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*)













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Lfp = Set +













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













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rules













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 (*least fixed point*)













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 lfp_def "lfp(f) == Inter({u. f(u) <= u})"













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end















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