Nuprl Lemma : es-after_wf 11,40

the_es:event_system{i:l}, e:es-E(the_es), x:Id.
es-after(the_es; x; e)  es-vartype(the_es; loc(e); x) 
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Definitionst  T, x:A. B(x), es_state_after(es; e), es_state(es; i), Id, es_vartype(es; i; x), x:AB(x), f(a), event_system{i:l}, es-E(es), rationals, es-T(es), , #$n, es-after(es; x; e), es-vartype(es; i; x)
Lemmasint inc rationals, Id wf, es-E wf, event system wf, es state after wf

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