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AutomataTheory
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1
1.
Alph:
Type
2.
L:
Alph*
Prop
3.
l:
Alph*
4.
i:
{0...||l||}
5.
null(l[0..i
])
6.
L(l[i..||l||
])
L(l)
By:
RWH (LemmaC
Thm*
as:T*. null(as)
as = nil) 5
Generated subgoal:
1
5.
(l[0..i
]) = nil
6.
L(l[i..||l||
])
L(l)
About:
]) = nil])
L(l)
Prop])]) L(l)
as:T*. null(as) 
as = nil)
5]) = nil]) L(l)
