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Step * of Lemma pioption_wf

∀[left,right:pi_term()].  (pioption(left;right) ∈ pi_term())
BY
{ DepprodCoDatatypeConstructorWf `pi_term_size` }

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Latex:

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Latex:
\mforall{}[left,right:pi\_term()].    (pioption(left;right)  \mmember{}  pi\_term())


By

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Latex:
DepprodCoDatatypeConstructorWf  `pi\_term\_size`

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