Step
*
of Lemma
RankEx2_ListProd_wf
∀[S,T:Type]. ∀[listprod:(S × RankEx2(S;T)) List].  (RankEx2_ListProd(listprod) ∈ RankEx2(S;T))
BY
{ DepprodCoDatatypeConstructorWf `RankEx2_size` }
Latex:
\mforall{}[S,T:Type].  \mforall{}[listprod:(S  \mtimes{}  RankEx2(S;T))  List].    (RankEx2\_ListProd(listprod)  \mmember{}  RankEx2(S;T))
By
DepprodCoDatatypeConstructorWf  `RankEx2\_size`
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