Nuprl Lemma : aframe-rule 0,22

i:Id, L:Id List, k:Knd.
@ik affects only members of L 
realizes es.
e@i.
kind(e) = k
 (x:Id.
 (((x after e) = (x when e vartype(i;x (x  L))
 (& ((x  L (x after e) = (x when e vartype(i;x))) 
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Definitionsx:AB(x), t  T, xt(x), Prop, P  Q, P & Q, T, True, x(s), es is an event system of D, x:AB(x)
Lemmasd-realizes2-implies-realizes, d-single-aframe wf, Knd wf, Id wf, alle-at wf, es-kind wf, not wf, es-vartype wf, es-after wf, squash wf, true wf, event system wf, es-when wf, l member wf, es-E wf, es-loc wf

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