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Step * of Lemma geo-parallel-right-comm

∀e:EuclideanPlane. ∀a,b,c,d:Point.  (geo-parallel(e;a;b;c;d) ⇒ geo-parallel(e;a;b;d;c))
BY
{ (((Auto THEN D -1 THEN D 0) THEN Auto) THEN InstHyp [⌜x⌝] 8⋅ THEN Auto) }

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Latex:

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Latex:
\mforall{}e:EuclideanPlane.  \mforall{}a,b,c,d:Point.    (geo-parallel(e;a;b;c;d)  {}\mRightarrow{}  geo-parallel(e;a;b;d;c))


By

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Latex:
(((Auto  THEN  D  -1  THEN  D  0)  THEN  Auto)  THEN  InstHyp  [\mkleeneopen{}x\mkleeneclose{}]  8\mcdot{}  THEN  Auto)

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