Nuprl Lemma : es-init-state_wf 11,40

es:event_system{i:l}, i:Id. es-init-state(es; i)  es-state(es; i) 
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Definitionsevent_system{i:l}, t  T, Id, x:A. B(x), es-initially(es; i; x), x.A(x), es-init-state(es; i), es-state(es; i)
Lemmases-initially wf, Id wf, event system wf

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