Step 
*
 of Lemma 
sq_stable__geo-out
∀e:BasicGeometry. ∀p,a,b:Point.  SqStable(out(p ab))
BY
 
{ (Unfold `geo-out` 0 THEN Auto) }
 
Latex: 
Latex:
\mforall{}e:BasicGeometry.  \mforall{}p,a,b:Point.    SqStable(out(p  ab))
 By 
Latex:
(Unfold  `geo-out`  0  THEN  Auto)
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