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Step * of Lemma geo-eq-preserves-col

∀g:EuclideanPlane. ∀a,b,x,y:Point.  (a ≡ b ⇒ Colinear(a;x;y) ⇒ Colinear(b;x;y))
BY
{ (Auto THEN (Assert b ≡ a BY Auto) THEN RWO "8" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}g:EuclideanPlane.  \mforall{}a,b,x,y:Point.    (a  \mequiv{}  b  {}\mRightarrow{}  Colinear(a;x;y)  {}\mRightarrow{}  Colinear(b;x;y))


By

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Latex:
(Auto  THEN  (Assert  b  \mequiv{}  a  BY  Auto)  THEN  RWO  "8"  0  THEN  Auto)

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