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At: list length wf nat 1 1 1 1 2
1. T: Type
2. L: T List
3. u: T
4. v: T List
5. (Case of v; nil 0 ; h.t 1+Y((l,L. Case of L; nil 0 ; h.t 1+l(t)),t))

1+Y((l,L. Case of L; nil 0 ; h.t 1+l(t)),v)
By:
RWH YUnrollC 0
THEN
Reduce 0
Generated subgoals:

16. h: T
7. t: T List
8.
Y((l,L. Case of L; nil 0 ; h.t 1+l(t)),t)
2 01+(Case of v; nil 0 ; h.t 1+Y((l,L. Case of L; nil 0 ; h.t 1+l(t)),t))

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listlist_ind
intnatural_numberaddlambdaapplyycombuniversemember

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