Nuprl Lemma : fpf-sub-compatible-left 11,40

A:Type, B:(AType), eq:EqDecider(A), fg:a:A fp B(a). f  g  f || g 
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Definitionsx:AB(x), x(s), P  Q, f  g, f || g, A c B, P & Q, t  T, , xt(x)
Lemmasassert wf, fpf-dom wf, fpf-trivial-subtype-top, fpf-ap wf, fpf wf, deq wf

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