Nuprl Lemma : es-causl-wellfnd 0,22

the_es:ES. WellFnd{i}(E;x,y.(x < y)) 
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Definitionst  T, x:AB(x), (e < e'), E, P  Q, x,yt(x;y), P & Q, ES
Lemmasevent system wf, es-axioms, strongwf-implies, es-E wf, es-causl wf

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