Nuprl - Pf list all append lemma 1 2

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

M:T List. P(u) & x(v @ M).P(x) P(u) & xv.P(x) & xM.P(x)

By: UnivCD THEN Analyze -1 THEN Analyze 0

Generated subgoals:

1 7. M: T List
8. P(u)
9. x(v @ M).P(x)
P(u) & xv.P(x)

2 7. M: T List
8. P(u)
9. x(v @ M).P(x)
xM.P(x)

About:

1	7. `M:` `T List` 8. `P(u)` 9. `x(v @ M).P(x)` `P(u) & xv.P(x)`
2	7. `M:` `T List` 8. `P(u)` 9. `x(v @ M).P(x)` `xM.P(x)`