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Step * of Lemma por-left_wf

∀[v:formula()]. por-left(v) ∈ formula() supposing ↑por?(v)
BY
{ DepprodCoDatatypeSelectorWf }

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Latex:

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Latex:
\mforall{}[v:formula()].  por-left(v)  \mmember{}  formula()  supposing  \muparrow{}por?(v)


By

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Latex:
DepprodCoDatatypeSelectorWf

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