Nuprl Lemma : star-append_wf 0,22

T:Type, PQ:((T List)Prop). star-append(T;P;Q (T List)Prop 
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Definitionst  T, Prop, x:AB(x), concat(ll), as @ bs, P & Q, xt(x), xLP(x), x:AB(x), star-append(T;P;Q)
Lemmasl all wf, append wf, concat wf

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