Nuprl Lemma : fifoReceiver-exists 11,40

es:ES, ff:FIFO.
rcvr:j,i:ff.C{e:E| ff.S(j,i,e)} {e:E| ff.R(i,e)} 
(ji:ff.C, e:{e:E| ff.S(j,i,e)} . ff.Sender(i,rcvr(j,i,e)) = e
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Definitionsx:AB(x), t  T, x:AB(x), , t.1, P  Q, Q  f P, P & Q, Q f P, A c B
LemmasFIFO wf, event system wf, fifoSender-antecedent, es-E wf, fifoS wf, fifoC wf, fifoSender wf, fifoR wf

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