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Step * of Lemma tree_node_wf

∀[E:Type]. ∀[left,right:tree(E)].  (tree_node(left;right) ∈ tree(E))
BY
{ DepprodCoDatatypeConstructorWf `tree_size` }

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Latex:

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Latex:
\mforall{}[E:Type].  \mforall{}[left,right:tree(E)].    (tree\_node(left;right)  \mmember{}  tree(E))


By

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Latex:
DepprodCoDatatypeConstructorWf  `tree\_size`

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