src/HOL/UNITY/SubstAx.thy
author paulson
Wed Aug 05 10:57:25 1998 +0200 (1998-08-05)
changeset 5253 82a5ca6290aa
parent 5111 8f4b72f0c15d
child 5277 e4297d03e5d2
permissions -rw-r--r--
New record type of programs
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(*  Title:      HOL/UNITY/SubstAx
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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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My treatment of the Substitution Axiom -- not as an axiom!
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*)
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SubstAx = WFair +
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constdefs
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   LeadsTo :: "['a program, 'a set, 'a set] => bool"
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    "LeadsTo prg A B ==
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		 leadsTo (Acts prg)
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                         (reachable prg  Int  A)
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  		         (reachable prg  Int  B)"
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end