Nuprl Lemma : comb_for_listify_wf 2,24

(T,m,n,f,zf{m..n})  T:Typem,n:({m..n}T)True(T List) 
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Definitionst  T, x:AB(x), {i..j}, True, T
Lemmaslistify wf, squash wf, true wf, int seg wf

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