Step
*
of Lemma
RankEx2_LeafS_wf
∀[S,T:Type]. ∀[leafs:S].  (RankEx2_LeafS(leafs) ∈ RankEx2(S;T))
BY
{ DepprodCoDatatypeConstructorWf `RankEx2_size` }
Latex:
\mforall{}[S,T:Type].  \mforall{}[leafs:S].    (RankEx2\_LeafS(leafs)  \mmember{}  RankEx2(S;T))
By
DepprodCoDatatypeConstructorWf  `RankEx2\_size`
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