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Step * of Lemma idx_wf

∀[Val:Type]. ∀[n:ℕ]. ∀[AType:array{i:l}(Val;n)].  (idx(AType) ∈ ℕn ⟶ Arr(AType) ⟶ Val)
BY
{ (Unfolds ``array Arr`` 0 THEN ProveWfLemma) }

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Latex:

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Latex:
\mforall{}[Val:Type].  \mforall{}[n:\mBbbN{}].  \mforall{}[AType:array\{i:l\}(Val;n)].    (idx(AType)  \mmember{}  \mBbbN{}n  {}\mrightarrow{}  Arr(AType)  {}\mrightarrow{}  Val)


By

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Latex:
(Unfolds  ``array  Arr``  0  THEN  ProveWfLemma)

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