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At: lang sing prod 1 2

1. Alph: Type
2. L: Alph*Prop
3. l: Alph*

(i:{0...||l||}. null(l[0..i]) & L(l[i..||l||])) (L(l))

By: Analyze 0

Generated subgoal:

14. L(l)
i:{0...||l||}. null(l[0..i]) & L(l[i..||l||])


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existsnatural_numberandassertapply
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