src/HOL/UNITY/SubstAx.thy
author paulson
Fri Apr 03 12:34:33 1998 +0200 (1998-04-03)
changeset 4776 1f9362e769c1
child 5111 8f4b72f0c15d
permissions -rw-r--r--
New UNITY theory
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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 set, ('a * 'a)set set, 'a set, 'a set] => bool"
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    "LeadsTo Init Acts A B ==
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     leadsTo Acts (reachable Init Acts Int A)
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                  (reachable Init Acts Int B)"
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end