author | oheimb |
Thu, 18 Dec 1997 12:50:58 +0100 | |
changeset 4435 | 41a7e4f0e957 |
parent 3947 | eb707467f8c5 |
child 8882 | 9df44a4f1bf7 |
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 1994 University of Cambridge |
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Greatest fixed points (requires Lfp too!) |
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*) |
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Gfp = Lfp + |
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global |
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constdefs |
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gfp :: ['a set=>'a set] => 'a set |
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"gfp(f) == Union({u. u <= f(u)})" (*greatest fixed point*) |
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local |
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end |