src/CCL/Lfp.thy
author wenzelm
Sat, 17 Sep 2005 17:35:26 +0200
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(*  Title:      CCL/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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*)
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header {* The Knaster-Tarski Theorem *}
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theory Lfp
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imports Set
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uses "subset.ML" "equalities.ML" "mono.ML"
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begin
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constdefs
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  lfp :: "['a set=>'a set] => 'a set"     (*least fixed point*)
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  "lfp(f) == Inter({u. f(u) <= u})"
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ML {* use_legacy_bindings (the_context ()) *}
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end