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Step * of Lemma stable__geo-between

∀g:EuclideanPlaneStructure. ∀[a,b,c:Point].  Stable{B(abc)}
BY
{ ((D 0 THENA Auto) THEN (Unfold `geo-between` 0 THEN Auto) THEN D 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}g:EuclideanPlaneStructure.  \mforall{}[a,b,c:Point].    Stable\{B(abc)\}


By

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Latex:
((D  0  THENA  Auto)  THEN  (Unfold  `geo-between`  0  THEN  Auto)  THEN  D  0  THEN  Auto)

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