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At: list exists is member lemma 1 1 2 1 1 2
1. T: Type
2. eq: TT
3. (x,y:T. eq(x,y) x = y) & eq TT
4. P: TProp
5. L: T List
6. x: T
7. P(x)
8. u: T
9. v: T List
10. x(eq) v yv.P(y)
11. x(eq) (u.v)
12. eq(x,u)

P(u) yv.P(y)
By: DNth 2 0
Generated subgoal:

1 yv.P(y)

About:
listconsboolassertapplyfunctionuniverseequal
memberpropimpliesandorall

(35steps) PrintForm Definitions Lemmas list 3 jlc Sections Support(jlc) Doc