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src/CCL/lfp.thy
author nipkow
Fri, 04 Apr 1997 16:33:28 +0200
changeset 2912 3fac3e8d5d3e
parent 0 a5a9c433f639
permissions -rw-r--r--
moved inj and surj from Set to Fun and Inv -> inv.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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















isabelle