Nuprl Lemma : merge_wf 0,22

T:Type. T    (as, bs:T List. merge(as;bs)  T List) 
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Definitionst  T, x:A. B(x), P  Q, s-insert(x;l), reduce(f;k;as), merge(as;bs)
Lemmasreduce wf, s-insert wf

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