Step
*
of Lemma
RankEx1_Prod-prod_wf
∀[T:Type]. ∀[v:RankEx1(T)].  RankEx1_Prod-prod(v) ∈ RankEx1(T) × RankEx1(T) supposing ↑RankEx1_Prod?(v)
BY
{ DepprodCoDatatypeSelectorWf }
Latex:
\mforall{}[T:Type].  \mforall{}[v:RankEx1(T)].
    RankEx1\_Prod-prod(v)  \mmember{}  RankEx1(T)  \mtimes{}  RankEx1(T)  supposing  \muparrow{}RankEx1\_Prod?(v)
By
DepprodCoDatatypeSelectorWf
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