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Step * of Lemma three-intersection_wf

∀[A:Id List]. ∀[W:{a:Id| (a ∈ A)}  List List].  (three-intersection(A;W) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:


\mforall{}[A:Id  List].  \mforall{}[W:\{a:Id|  (a  \mmember{}  A)\}    List  List].    (three-intersection(A;W)  \mmember{}  \mBbbP{})


By

ProveWfLemma

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