src/HOL/Lfp.thy
author wenzelm
Thu, 15 Nov 2001 18:20:13 +0100
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child 14169 0590de71a016
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added Induct/Binary_Trees.thy, Induct/Tree_Forest (converted from former ex/TF.ML ex/TF.thy ex/Term.ML ex/Term.thy);
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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 = Product_Type +
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constdefs
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  lfp :: ['a set=>'a set] => 'a set
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  "lfp(f) == Inter({u. f(u) <= u})"    (*least fixed point*)
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end