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Step * of Lemma geo-out-strict-colinear

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∀e:BasicGeometry. ∀a,b,c:Point.  (geo-out-strict(e;a;b;c) ⇒ Colinear(a;b;c))
BY
{ ((Auto THEN (D 0 THENA Auto) THEN (D -2 THEN Auto) THEN D 0 THEN Auto)
   THEN (Assert Colinear(a;b;c) BY
               Auto)
   THEN Unfold `geo-colinear` -1
   THEN Auto) }

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Latex:

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Latex:
No  Annotations
\mforall{}e:BasicGeometry.  \mforall{}a,b,c:Point.    (geo-out-strict(e;a;b;c)  {}\mRightarrow{}  Colinear(a;b;c))


By

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Latex:
((Auto  THEN  (D  0  THENA  Auto)  THEN  (D  -2  THEN  Auto)  THEN  D  0  THEN  Auto)
  THEN  (Assert  Colinear(a;b;c)  BY
                          Auto)
  THEN  Unfold  `geo-colinear`  -1
  THEN  Auto)

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