Nuprl - Proof: assert l bexists 2 2

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At: assert l bexists 2 2

1. T: Type
2. L: T List
3. u: T
4. v: T List
5. P:(T). (xv.P(x)) (i:||v||. P(v[i]))
6. P: T
7. i: (||v||+1)
8. P([u / v][i])
9. i = 0

(xv.P(x))

By: BackThruSomeHyp

Generated subgoal:

1 i:||v||. P(v[i]) 2 steps

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(9steps total) PrintForm Definitions Lemmas graph 1 1 Sections Graphs Doc