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Step * of Lemma list-diff_wf

∀[T:Type]. ∀[eq:EqDecider(T)]. ∀[as,bs:T List].  (as-bs ∈ T List)
BY
{ (Unfold `list-diff` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[eq:EqDecider(T)].  \mforall{}[as,bs:T  List].    (as-bs  \mmember{}  T  List)


By

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Latex:
(Unfold  `list-diff`  0  THEN  Auto)

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