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At: hd reverse 1 2 2 1 1 1 1

1. T: Type
2. l: T*
3. u: T
4. v: T*
5. ||v|| = 0
6. hd(rev(v)) = v[(||v||-1)]

||v||+1 > 0 hd(rev(v)) = v[(||v||+1-1-1)]

By: RWH (HypC 6) 0

Generated subgoal:

1 ||v||+1 > 0 v[(||v||-1)] = v[(||v||+1-1-1)]


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