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Step * of Lemma sq_stable__geo-Aparallel

∀[g:EuclideanPlane]. ∀l,m:Line.  SqStable(l || m)
BY
{ (Unfold `geo-Aparallel` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[g:EuclideanPlane].  \mforall{}l,m:Line.    SqStable(l  ||  m)


By

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Latex:
(Unfold  `geo-Aparallel`  0  THEN  Auto)

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