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Step * of Lemma rev_implies_wf

∀[A,B:ℙ].  (A ⇐ B ∈ ℙ)
BY
{ ProveWfLemma }

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Latex:

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


By

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Latex:
ProveWfLemma

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