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At: lpower alt 1 2 2 1 1

1. Alph: Type
2. L: Alph*
3. n:
4. 0 < n
5. (Ln-1) = if n-1=0 nil else L @ (Ln-1-1) fi
6. n = 0
7. n-1 = 0

(Ln) = (L @ nil)

By: RWH (LemmaC Thm* as:T*. (as @ nil) = as) 0

Generated subgoal:

1 (Ln) = L


About:
equallistniluniverseint
less_thannatural_numbersubtractifthenelse