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Step * of Lemma product-wf

∀[A:Type]. ∀[B:A ⟶ Type].  (a:A × B[a] ∈ Type)
BY
{ Auto }

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Latex:

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Latex:
\mforall{}[A:Type].  \mforall{}[B:A  {}\mrightarrow{}  Type].    (a:A  \mtimes{}  B[a]  \mmember{}  Type)


By

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Latex:
Auto

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