Nuprl Lemma : rcv_one_one 11,40

l1,l2:IdLnk, tg1,tg2:Id.
(rcv(l1,tg1) = rcv(l2,tg2 Knd)  guard(((l1 = l2 (tg1 = tg2))) 
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Definitionsx:AB(x), P  Q, t  T, prop{i:l}, guard(T), xt(x), Knd, rcv(l,tg), x(s)
LemmasKnd wf, rcv wf, Id wf, IdLnk wf, pi1 wf, pi2 wf

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