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Step * of Lemma tree_node?_wf

∀[E:Type]. ∀[v:tree(E)].  (tree_node?(v) ∈ 𝔹)
BY
{ DepprodCoDatatypeRecognizerWf }

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Latex:

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Latex:
\mforall{}[E:Type].  \mforall{}[v:tree(E)].    (tree\_node?(v)  \mmember{}  \mBbbB{})


By

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Latex:
DepprodCoDatatypeRecognizerWf

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