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Step * of Lemma down-closed_wf

∀[T:Type]. ∀[X:(T List) ⟶ ℙ].  (down-closed(T;X) ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[X:(T  List)  {}\mrightarrow{}  \mBbbP{}].    (down-closed(T;X)  \mmember{}  \mBbbP{})


By

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Latex:
ProveWfLemma

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