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Step * of Lemma adjacent_wf

∀[T:Type]. ∀[L:T List]. ∀[x,y:T].  (adjacent(T;L;x;y) ∈ ℙ)
BY
{ (Unfold `adjacent` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[T:Type].  \mforall{}[L:T  List].  \mforall{}[x,y:T].    (adjacent(T;L;x;y)  \mmember{}  \mBbbP{})


By

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Latex:
(Unfold  `adjacent`  0  THEN  Auto)

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