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Step * of Lemma add-nth_wf

∀[T:Type]. ∀[L:T List]. ∀[n:ℕ]. ∀[x:T].  (add-nth(n;x;L) ∈ T List)
BY
{ ProveWfLemma }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[L:T  List].  \mforall{}[n:\mBbbN{}].  \mforall{}[x:T].    (add-nth(n;x;L)  \mmember{}  T  List)


By

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Latex:
ProveWfLemma

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