Step 
*
 of Lemma 
geo-between-implies-colinear2
∀e:BasicGeometry. ∀[a,b,c:Point].  Colinear(a;b;c) supposing c_a_b
BY
 
{ (Auto THEN D 0 THEN Auto) }
 
Latex: 
Latex:
\mforall{}e:BasicGeometry.  \mforall{}[a,b,c:Point].    Colinear(a;b;c)  supposing  c\_a\_b
 By 
Latex:
(Auto  THEN  D  0  THEN  Auto)
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