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Step * of Lemma permute-to-front_wf

∀[T:Type]. ∀[L:T List]. ∀[idxs:ℕ List].  (permute-to-front(L;idxs) ∈ T List)
BY
{ (ProveWfLemma THEN RWW "length-append filter-split-length length_upto" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[L:T  List].  \mforall{}[idxs:\mBbbN{}  List].    (permute-to-front(L;idxs)  \mmember{}  T  List)


By

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Latex:
(ProveWfLemma  THEN  RWW  "length-append  filter-split-length  length\_upto"  0  THEN  Auto)

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