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Step * of Lemma sq_stable__geo-non-parallel

∀[g:EuclideanParPlane]. ∀[l:Line]. ∀[L:l,m:Line//l || m].  SqStable(geo-non-parallel(g;l;L))
BY
{ (Auto THEN Unfold `geo-non-parallel` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[g:EuclideanParPlane].  \mforall{}[l:Line].  \mforall{}[L:l,m:Line//l  ||  m].    SqStable(geo-non-parallel(g;l;L))


By

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Latex:
(Auto  THEN  Unfold  `geo-non-parallel`  0  THEN  Auto)

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