Nuprl Lemma : atom-free-es-vartype 0,22

es:ES, ix:Id. AtomFree(Type;vartype(i;x)) 
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Definitionsx:AB(x), P & Q, ESAtomAxiom{i:l}(T;V), vartype(i;x), ES, t  T, x:AB(x), Id, Type, AtomFree(T;x), x:AB(x)
Lemmasevent system wf

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