Nuprl Lemma : bframe-p_wf 11,40

es:event_system{i:l}, i:Id, k:Knd, L:(IdLnk List). bframe-p(es; i; k; L)  prop{i:l} 
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Definitionst  T, {x:A| B(x)} , es-Msgl(es; l), event_system{i:l}, Id, Knd, IdLnk, type List, es-Msg(es), x:AB(x), x:A. B(x), loc(e), s = t, es-E(es), [], subtype(S; T), es-sends(es; l; e), prop{i:l}, (x  l), A, P  Q, es-kind(es; e), x. t(x), alle-at(es; i; e.P(e)), bframe-p(es; i; k; L)
Lemmasalle-at wf, es-kind wf, not wf, l member wf, es-sends wf, es-Msgl wf, es-Msg wf, es-E wf, es-loc wf, IdLnk wf, Knd wf, Id wf, event system wf

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