Nuprl Lemma : f-round_wf 11,40

es:event_system{i:l}, e:es-E(es), x,free:Id.
es-dtype(es; loc(e); x; Id)  (f-round{i:l}(xfreeese 
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Definitionsevent_system{i:l}, t  T, x:AB(x), es-E(es), Id, loc(e), es-dtype(esixT), P  Q, f-rank{i:l}(xfreeese), , x.A(x), xt(x), t.1, f-round{i:l}(xfreeese)
Lemmaspi1 wf, nat wf, f-rank wf, es-dtype wf, es-loc wf, Id wf, es-E wf, event system wf

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