Nuprl Lemma : itop_aux_wf 13,42

A:Type, op:(AAA), id:Ap:q:{p...}, E:({p..q}A). (op,idp  i < qE(i A 
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Upgroups 1
DefinitionsA  B, A, False, P  Q, {i..j}, {x:AB(x)} , {i...}, x:AB(x), , x:AB(x), t  T, Type, x.A(x), n - m, , !Void(), n+m, -n, #$n, i  j , a < b, (op,idlb  i < ubE(i), xt(x), x(s), f(a), , s = t
Lemmasnat wf, itop wf, nat properties, ge wf, le wf, int upper wf, int seg wf

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