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Step * of Lemma rtermAdd_wf

∀[left,right:rat_term()].  (left "+" right ∈ rat_term())
BY
{ DepprodCoDatatypeConstructorWf `rat_term_size` }

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Latex:

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Latex:
\mforall{}[left,right:rat\_term()].    (left  "+"  right  \mmember{}  rat\_term())


By

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Latex:
DepprodCoDatatypeConstructorWf  `rat\_term\_size`

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