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At: lang sing prod 1 1 1 1 1 1

1. Alph: Type
2. L: Alph*Prop
3. l: Alph*
4. i: {0...||l||}
5. (l[0..i]) = nil
6. L(l[i..||l||])

L(l)

By: ApFunToHypEquands `x' ||x|| 5

Generated subgoals:

17. x: Alph*
||x|| = ||x||
27. ||l[0..i]|| = ||nil||
L(l)


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applyintuniversefunctionlist
propnatural_numberequalnil