Nuprl Lemma : fpf-map_wf 0,22

AC:Type, B:(AType), x:a:A fp B(a), f:(a:{a:A| (a  fpf-domain(x)) }B(a)C).
fpf-map(a,v.f(a,v);x C List 
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Definitionst  T, x:AB(x), (x  l), x(s1,s2), x(s), fpf-map(a,v.f(a;v);x), a:A fp B(a), 1of(t), xt(x), fpf-domain(f)
Lemmasfpf wf, map-wf2, l member wf

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