Nuprl Lemma : l_disjoint-fpf-join-dom 11,40

A:Type, eq:EqDecider(A), fg:a:A fp Top, L:(A List).
l_disjoint(A;f  g.1;L (l_disjoint(A;f.1;L) & l_disjoint(A;g.1;L)) 
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DefinitionsP  Q, t.1, t  T, P  Q, x:AB(x), l_disjoint(T;l1;l2), , P & Q, Top, P  Q, xt(x), EqDecider(T), a:A fp B(a), f  g, x  dom(f), b, P  Q, (x  l), False, A, {T}
Lemmaspi1 wf, l member wf, fpf-join-dom, assert wf, fpf-dom wf, fpf wf, deq wf, l disjoint-fpf-dom, fpf-join wf, top wf, l disjoint wf

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