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