Step
*
of Lemma
RankEx1_Leaf_wf
∀[T:Type]. ∀[leaf:T].  (RankEx1_Leaf(leaf) ∈ RankEx1(T))
BY
{ DepprodCoDatatypeConstructorWf `RankEx1_size` }
Latex:
\mforall{}[T:Type].  \mforall{}[leaf:T].    (RankEx1\_Leaf(leaf)  \mmember{}  RankEx1(T))
By
DepprodCoDatatypeConstructorWf  `RankEx1\_size`
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