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AutomataTheory
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2
1.
Alph:
Type
2.
L:
Alph*
Prop
3.
l:
Alph*
4.
L(l)
null(l[||l||..||l||
])
By:
RWH (LemmaC
Thm*
as:T*. null(as)
as = nil) 0
Generated subgoal:
1
(l[||l||..||l||
]) = nil
About:
(l[||l||..||l||
]) = nil
Prop null(l[||l||..||l||])
as:T*. null(as) 
as = nil)
0 (l[||l||..||l||]) = nil
