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Step * of Lemma filter_wf

∀[T:Type]. ∀[l:T List]. ∀[P:T ⟶ 𝔹].  (filter(P;l) ∈ T List)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[l:T  List].  \mforall{}[P:T  {}\mrightarrow{}  \mBbbB{}].    (filter(P;l)  \mmember{}  T  List)


By

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Latex:
ProveWfLemma

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