Nuprl Lemma : weighted-sum_wf 11,40

p:( List), F:({0..||p||}). weighted-sum(p;F)   
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Definitions, t  T, type List, x:A. B(x), ||as||, #$n, {i..j}, Type, x:AB(x), P & Q, i  j < k, a < b, P  Q, False, A, A  B, , {x:A| B(x)} , Void, l[i], f(a), r * s, x. t(x), a  j < b. E(j), weighted-sum(p;F)
Lemmasqsum wf, qmul wf, select wf, int seg wf, length wf1, rationals wf

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