Nuprl Lemma : l_all_iff 11,40

T:Type, L:(T List), P:(T). (xLP(x))  (i:{0..||L||}. P(L[i])) 
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DefinitionsType, t  T, s = t, type List, , x:AB(x), ||as||, a < b, P  Q, False, A, P & Q, A  B, i  j < k, , {x:AB(x)} , {i..j}, Void, x:AB(x), l[i], f(a), x(s), #$n, , |g|, S  T, A c B, x:A  B(x), x:AB(x), P  Q, P  Q, (x  l), xLP(x)
Lemmasle wf, nat wf, int seg wf, length wf1, select wf

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