Step
*
of Lemma
FormVar-name_wf
∀[C:Type]. ∀[v:Form(C)].  FormVar-name(v) ∈ Atom supposing ↑FormVar?(v)
BY
{ DepprodCoDatatypeSelectorWf }
Latex:
Latex:
\mforall{}[C:Type].  \mforall{}[v:Form(C)].    FormVar-name(v)  \mmember{}  Atom  supposing  \muparrow{}FormVar?(v)
By
Latex:
DepprodCoDatatypeSelectorWf
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