Nuprl Lemma : fpf-trivial-subtype-top 0,22

A:Type, B:(AType), f:a:A fp B(a). f  a:A fp Top 
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Definitionsx:AB(x), x(s), t  T, Top, xt(x), P  Q
Lemmassubtype-fpf3, top wf, strong-subtype-self, fpf wf

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