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Step * of Lemma sq_stable__r2-left

∀a,b,c:ℝ^2.  SqStable(r2-left(a;b;c))
BY
{ (Unfold `r2-left` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}a,b,c:\mBbbR{}\^{}2.    SqStable(r2-left(a;b;c))


By

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Latex:
(Unfold  `r2-left`  0  THEN  Auto)

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