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At: hd is member lemma 1

1. T: Type
2. eq: {T}
3. L: T List
4. ||L||1

hd(L)(eq) L

By: ListInd 3

Generated subgoals:

1 ||nil||1 hd(nil)(eq) nil
24. u: T
5. v: T List
6. ||v||1 hd(v)(eq) v
||u.v||1 hd((u.v))(eq) (u.v)

About:
listconsnilassertnatural_numberuniverseimplies

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