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Lfp.thy
author lcp
Wed, 12 Oct 1994 12:00:45 +0100
changeset 151 c0e62be6ef04
parent 116 ab4328bbff70
child 178 12dd5d2e266b
permissions -rw-r--r--
{HOL,ZF}/indrule/ind_tac: now calls DEPTH_SOLVE_1 instead of REPEAT, to solve the goal fully before proceeding {HOL,ZF}/indrule/mutual_ind_tac: ensures that calls to "prem" cannot loop; calls DEPTH_SOLVE_1 instead of REPEAT to solve the goal fully {HOL,ZF}/intr_elim/intro_tacsf: now calls DEPTH_SOLVE_1 instead of REPEAT to solve the goal fully
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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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HOL/subset.thy, equalities.thy, mono.thy: new



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Lfp = mono + 








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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















Old_HOL