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Step * of Lemma bst_null_wf

∀[E:Type]. (bst_null() ∈ bs_tree(E))
BY
{ DepprodCoDatatypeConstructorWf `bs_tree_size` }

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Latex:

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Latex:
\mforall{}[E:Type].  (bst\_null()  \mmember{}  bs\_tree(E))


By

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Latex:
DepprodCoDatatypeConstructorWf  `bs\_tree\_size`

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