Step 
*
 of Lemma 
pi-subst-aux_wf
∀[p:pi_term()]. (pi-subst-aux(p) ∈ (Name List) ─→ ((Name × Name) List) ─→ pi_term())
BY
 
{ ProveWfLemma }
 
Latex: 
Latex:
\mforall{}[p:pi\_term()].  (pi-subst-aux(p)  \mmember{}  (Name  List)  {}\mrightarrow{}  ((Name  \mtimes{}  Name)  List)  {}\mrightarrow{}  pi\_term())
 By 
Latex:
ProveWfLemma
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