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Step * of Lemma geo-opp-side-sym2

∀e:BasicGeometry. ∀a,b,p,q:Point.  (a-pq-b ⇒ a-qp-b)
BY
{ (Auto THEN RepeatFor 4 (ParallelLast) THEN Auto) }

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Latex:

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Latex:
\mforall{}e:BasicGeometry.  \mforall{}a,b,p,q:Point.    (a-pq-b  {}\mRightarrow{}  a-qp-b)


By

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Latex:
(Auto  THEN  RepeatFor  4  (ParallelLast)  THEN  Auto)

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