author  paulson 
Thu, 29 Apr 1999 10:51:58 +0200  
changeset 6536  281d44905cab 
parent 5648  fe887910e32e 
child 6575  70d758762c50 
permissions  rwrr 
4776  1 
(* Title: HOL/UNITY/SubstAx 
2 
ID: $Id$ 

3 
Author: Lawrence C Paulson, Cambridge University Computer Laboratory 

4 
Copyright 1998 University of Cambridge 

5 

6536  6 
Weak LeadsTo relation (restricted to the set of reachable states) 
4776  7 
*) 
8 

5313
1861a564d7e2
Constrains, Stable, Invariant...more of the substitution axiom, but Union
paulson
parents:
5277
diff
changeset

9 
SubstAx = WFair + Constrains + 
4776  10 

6536  11 
consts 
12 
LeadsTo :: "['a set, 'a set] => 'a program set" (infixl 60) 

4776  13 

6536  14 
defs 
15 
LeadsTo_def 

16 
"A LeadsTo B == {F. F : (reachable F Int A) leadsTo 

17 
(reachable F Int B)}" 

4776  18 
end 