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Step * of Lemma empty-wfd-tree_wf

∀[T:Type]. ∀[t:wfd-tree(T)].  (empty-wfd-tree(t) ∈ 𝔹)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[t:wfd-tree(T)].    (empty-wfd-tree(t)  \mmember{}  \mBbbB{})


By

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Latex:
ProveWfLemma

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