Nuprl Lemma : member_upto2 11,40

ni:. (i < n (i  upto(n)) 
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Definitionsx:AB(x), P  Q, (x  l), {i..j}, x:AB(x), A c B, t  T, A  B, i  j < k, P & Q, , A, False,
Lemmaslength upto, select upto, le wf, length wf1, int seg wf, upto wf, select wf, nat wf

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