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Step * of Lemma pgeo-leq_inversion

∀g:ProjectivePlane. ∀l,m:Line.  (l ≡ m ⇒ m ≡ l)
BY
{ EAuto 1 }

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Latex:

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Latex:
\mforall{}g:ProjectivePlane.  \mforall{}l,m:Line.    (l  \mequiv{}  m  {}\mRightarrow{}  m  \mequiv{}  l)


By

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Latex:
EAuto  1

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