Step
*
of Lemma
A-open-box_wf
∀X:CubicalSet. ∀A:{X ⊢ _}. ∀I:Cname List. ∀alpha:X(I).
  ∀[J:Cname List]. ∀[x:nameset(I)]. ∀[i:ℕ2].  (A-open-box(X;A;I;alpha;J;x;i) ∈ Type)
BY
{ ProveWfLemma }
Latex:
Latex:
\mforall{}X:CubicalSet.  \mforall{}A:\{X  \mvdash{}  \_\}.  \mforall{}I:Cname  List.  \mforall{}alpha:X(I).
    \mforall{}[J:Cname  List].  \mforall{}[x:nameset(I)].  \mforall{}[i:\mBbbN{}2].    (A-open-box(X;A;I;alpha;J;x;i)  \mmember{}  Type)
By
Latex:
ProveWfLemma
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