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Step * of Lemma sq_stable__geo-lsep

∀g:EuclideanPlaneStructure. ∀a,b,c:Point.  SqStable(a # bc)
BY
{ (Unfold `geo-lsep` 0 THEN (D 0 THENA Auto) THEN UseWitness ⌜g."Lorsquashstable"⌝ THEN RecordSelectWf THEN Auto) }

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Latex:

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Latex:
\mforall{}g:EuclideanPlaneStructure.  \mforall{}a,b,c:Point.    SqStable(a  \#  bc)


By

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Latex:
(Unfold  `geo-lsep`  0
  THEN  (D  0  THENA  Auto)
  THEN  UseWitness  \mkleeneopen{}g."Lorsquashstable"\mkleeneclose{}
  THEN  RecordSelectWf
  THEN  Auto)

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