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Step * of Lemma btr_Node?_wf

∀[v:binary-tree()]. (btr_Node?(v) ∈ 𝔹)
BY
{ DepprodCoDatatypeRecognizerWf }

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Latex:

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Latex:
\mforall{}[v:binary-tree()].  (btr\_Node?(v)  \mmember{}  \mBbbB{})


By

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Latex:
DepprodCoDatatypeRecognizerWf

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