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Step * of Lemma select-indices_wf

∀[A:Type]. ∀[f:A ─→ 𝔹]. ∀[L:A List].  (select-indices(f;L) ∈ ℕ List)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[A:Type].  \mforall{}[f:A  {}\mrightarrow{}  \mBbbB{}].  \mforall{}[L:A  List].    (select-indices(f;L)  \mmember{}  \mBbbN{}  List)


By

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Latex:
ProveWfLemma

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