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src/HOL/Inverse_Image.thy
author nipkow
Mon, 18 Dec 2000 16:45:17 +0100
changeset 10696 76d7f6c9a14c
parent 10213 01c2744a3786
child 10832 e33b47e4246d
permissions -rw-r--r--
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(*  Title:      HOL/Inverse_Image.thy
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    ID:         $Id$
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    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
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    Copyright   1998  University of Cambridge
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Inverse image of a function













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*)













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Inverse_Image = Set +













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constdefs













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  vimage :: ['a => 'b, 'b set] => ('a set)   (infixr "-``" 90)













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    "f-``B  == {x. f(x) : B}"













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end















isabelle