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

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At: append is member lemma 1 2 2 1 1

1. T: Type
2. eq: {T=}
3. eq TT
4. x,y:T. eq(x,y) x = y
5. L: T List
6. x: T
7. u: T
8. v: T List
9. (M,N:T List. v = (M @ (x.N))) x(eq) v
10. eq(x,u) = false
11. M,N:T List. u.v = (M @ (x.N))

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

By: Analyze 11 THEN Analyze -1

Generated subgoal:

1 11. M: T List
12. N: T List
13. u.v = (M @ (x.N))
M,N:T List. v = (M @ (x.N))

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