Nuprl Lemma : increasing_implies_le 11,40

k:, f:(int_seg(0; k)).
increasing(f; k)  guard((x,y:int_seg(0; k). (x  y)  ((f(x))  (f(y))))) 
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Definitionst  T, guard(T), P  Q, x:A. B(x), False, A, A  B, int_seg(i; j), , P  Q, decidable(P), prop{i:l}
Lemmasnat wf, increasing wf, int seg wf, le wf, decidable int equal, increasing implies

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