Nuprl - Proof: reject wf 1 3

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At: reject wf 1 3

1. A : Type
2. n :

3. 0<n
4.

l:A List. l\[n-1]

A List

l:A List. l\[n]

A List

By:	(Analyze 0) THEN (RecUnfold `reject` 0) THEN SplitOnConclITE

Generated subgoals:

1 5. l : A List
6. n0
tl(l) A List
1 step

2 5. l : A List
6. 0<n
(Case of l; nil nil ; a'.as' a'.as'\[n-1]) A List
5 steps

About:

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1	5. l : A List 6. n0 tl(l) A List	1 step
2	5. l : A List 6. 0<n (Case of l; nil nil ; a'.as' a'.as'\[n-1]) A List	5 steps