At: lpower alt 1 2 2 1 2 2 1 1 1
1. Alph: Type
2. L: Alph*
3. n: 
4. 0 < n
5. (L
n-1) = if n-1=
0
nil else L @ (L
n-1-1) fi
6.
n = 0
7.
n-1 = 0
8. (L
n-1) = (L @ (L
n-1-1))
if n=
0
nil else (L
n-1) @ L fi = ((L
n-1) @ L)
By: SplitOnConclITE
Generated subgoals:None
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