Nuprl Lemma : es-causle-time 11,40

es:event_system{i:l}, a,b:es-E(es). a c b  qle(es-time(esa); es-time(esb)) 
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Definitionsleft + right, P  Q, e c e', event_system{i:l}, t  T, x:AB(x), es-E(es), qle(rs), P  Q, es-time(ese), s = t, prop{i:l}, sqequal(st), guard(T), sq_type(T), let x,y = A in B(x;y), t.1
Lemmasqle reflexivity, qle wf, es-time wf, es-time-order, es-causle wf, es-E wf, event system wf

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