Nuprl Lemma : no_repeats-merge 11,40

T:Type. 
subtype_rel(T; )
 (bs,as:(T List). no_repeats(T; as)  sorted(as)  no_repeats(T; merge(as; bs))) 
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Definitionsno_repeats(T; l), x:A. B(x), sorted(L), t  T, P  Q, merge(as; bs), subtype(S; T)
Lemmassorted-merge, sorted wf, no repeats wf, s-insert-no-repeats, merge wf

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