Nuprl Lemma : es-when_wf 11,40

the_es:event_system{i:l}, e:es-E(the_es), x:Id.
es-when(the_esxe es-vartype(the_es; loc(e); x
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Definitionst  T, x:AB(x), es_state_when(ese), es_state(esi), Id, es_vartype(esix), x:AB(x), f(a), event_system{i:l}, es-E(es), rationals, es-T(es), , #$n, es-when(esxe), es-vartype(esix)
Lemmasint inc rationals, Id wf, es-E wf, event system wf, es state when wf

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