Step
*
of Lemma
MTree_Node?_wf
∀[T:Type]. ∀[v:MultiTree(T)].  (MTree_Node?(v) ∈ 𝔹)
BY
{ DepprodCoDatatypeRecognizerWf }
Latex:
\mforall{}[T:Type].  \mforall{}[v:MultiTree(T)].    (MTree\_Node?(v)  \mmember{}  \mBbbB{})
By
DepprodCoDatatypeRecognizerWf
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