Nuprl Lemma : es-rcv-from-implies 0,22

es:ES, e:E, l:IdLnk, L:E List.
rcvs from e on l = L
 (i:||L||. e':E. isrcv(e') & lnk(e') = l & sender(e') = e & index(e') = i  
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Definitionsx:AB(x), P  Q, x:AB(x), P & Q, t  T, A & B, AB, A, False, Prop, rcvs from e on l = L, {i..j}, P  Q, i  j < k
Lemmases-rcv-from-member-index, select wf, length wf1, select member, assert wf, es-isrcv wf, es-lnk wf, es-sender wf, es-index wf, int seg wf, es-Msgl wf, es-sends wf, es-E wf, es-rcv-from wf, IdLnk wf, event system wf

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