author | wenzelm |
Wed, 03 Feb 1999 20:25:53 +0100 | |
changeset 6219 | b360065c2b07 |
parent 1474 | 3f7d67927fe2 |
child 17456 | bcf7544875b2 |
permissions | -rw-r--r-- |
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(* Title: HOL/gfp.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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Greatest fixed points |
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*) |
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Gfp = Lfp + |
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consts gfp :: "['a set=>'a set] => 'a set" |
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rules |
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(*greatest fixed point*) |
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gfp_def "gfp(f) == Union({u. u <= f(u)})" |
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end |