Nuprl Lemma : fpf-compatible-symmetry 0,22

A:Type, eq:EqDecider(A), B:(AType), fg:a:A fp B(a). f || g  g || f 
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DefinitionsP & Q, x:AB(x), P  Q, t  T, xt(x), x(s), Top, a:A fp B(a), x  dom(f), b, Prop, f || g, EqDecider(T)
Lemmasfpf-compatible wf, fpf wf, deq wf, assert wf, fpf-dom wf, fpf-trivial-subtype-top

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