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Step * of Lemma geo-colinear-cycle

∀e:EuclideanPlane. ∀a,b,c:Point.  (Colinear(a;b;c) ⇒ Colinear(c;a;b))
BY
{ (Auto THEN RepeatFor 2 (ParallelLast) THEN Auto) }

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Latex:

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Latex:
\mforall{}e:EuclideanPlane.  \mforall{}a,b,c:Point.    (Colinear(a;b;c)  {}\mRightarrow{}  Colinear(c;a;b))


By

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Latex:
(Auto  THEN  RepeatFor  2  (ParallelLast)  THEN  Auto)

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