Nuprl Lemma : es-causl_transitivity 11,40

es:ES, xyz:E. (x < y (y < z (x < z
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Definitionst  T, P  Q, x:AB(x), Trans(T;x,y.E(x;y)), x:A  B(x), P & Q, ES, E, (e < e')
Lemmases-causl wf, es-E wf, event system wf, es-axioms

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