Nuprl Lemma : comb_for_interleaving_wf 4,23

(T,L1,L2,L,z. interleaving(T;L1;L2;L))  T:Type(T List)(T List)(T List)TrueProp 
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DefinitionsTrue, t  T, x:AB(x), T
Lemmasinterleaving wf, squash wf, true wf

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