Nuprl - Pf list exists is member append lemma 1 1 1 2 1 2

1. T: Type
2. P: TProp
3. L: T List
4. u: T
5. v: T List
6. xv.P(x) (M,N:T List, x:T. P(x) & v = (M @ (x.N)))
7. xv.P(x)

M,N:T List, x:T. P(x) & u.v = (M @ (x.N))

By: FwdThru -2 [-1] THEN Repeat (Analyze -1)

Generated subgoal:

1 8. M: T List
9. N: T List
10. x: T
11. P(x)
12. v = (M @ (x.N))
M,N:T List, x:T. P(x) & u.v = (M @ (x.N))

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