Step
*
of Lemma
FormExists_wf
∀[C:Type]. ∀[var:Atom]. ∀[body:Form(C)].  (∃var. body ∈ Form(C))
BY
{ DepprodCoDatatypeConstructorWf `Form_size` }
Latex:
Latex:
\mforall{}[C:Type].  \mforall{}[var:Atom].  \mforall{}[body:Form(C)].    (\mexists{}var.  body  \mmember{}  Form(C))
By
Latex:
DepprodCoDatatypeConstructorWf  `Form\_size`
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