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Step * of Lemma sorted-by_wf_nil

∀[R:Top]. (sorted-by(R;[]) ∈ ℙ)
BY
{ (Unfold `sorted-by` 0 THEN Reduce 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[R:Top].  (sorted-by(R;[])  \mmember{}  \mBbbP{})


By

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Latex:
(Unfold  `sorted-by`  0  THEN  Reduce  0  THEN  Auto)

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