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(* Title: ZF/ex/Acc.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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Inductive definition of acc(r)
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See Ch. Paulin-Mohring, Inductive Definitions in the System Coq.
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Research Report 92-49, LIP, ENS Lyon. Dec 1992.
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*)
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Acc = Main +
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consts
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acc :: i=>i
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inductive
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domains "acc(r)" <= "field(r)"
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intrs
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vimage "[| r-``{a}: Pow(acc(r)); a \\<in> field(r) |] ==> a \\<in> acc(r)"
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monos Pow_mono
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end
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