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Step * of Lemma ext-eq_wf

∀[A,B:Type].  (A ≡ B ∈ ℙ)
BY
{ (Unfold `ext-eq` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[A,B:Type].    (A  \mequiv{}  B  \mmember{}  \mBbbP{})


By

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Latex:
(Unfold  `ext-eq`  0  THEN  Auto)

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