Nuprl Lemma : es-pplus_functionality_wrt_implies 0,22
es:ES, e1:E, e2:{e:E| loc(e) = loc(e1)  Id }, p,
p':({e:E| loc(e) = loc(e1)  Id }{e:E| loc(e) = loc(e1)  Id }Prop).
(a, b:{e:E| loc(e) = loc(e1)  Id }. (a  [e1, e2])  (b  [e1, e2])  {p(a,b)  p'(a,b)})
 {[e1,e2]~([a,b].p(a,b))+  [e1,e2]~([a,b].p'(a,b))+} 
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DefinitionsP  Q, Prop, t  T, x(s1,s2), x:A. B(x), {T}, [e, e'], E, (x  l), loc(e), Id, [e1;e2]~([a,b].p(a;b))*[a,b].q(a;b), [e1,e2]~([a,b].p(a;b))+, ES
Lemmases-pstar-q functionality wrt implies, event system wf, Id wf, es-loc wf, l member wf, es-E wf, es-interval wf, guard wf

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