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Step * of Lemma real-vec-sep-symmetry

∀n:ℕ. ∀a,b:ℝ^n.  (a ≠ b ⇐⇒ b ≠ a)
BY
{ ((Auto THEN ParallelLast) THEN RWO "real-vec-dist-symmetry" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}n:\mBbbN{}.  \mforall{}a,b:\mBbbR{}\^{}n.    (a  \mneq{}  b  \mLeftarrow{}{}\mRightarrow{}  b  \mneq{}  a)


By

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Latex:
((Auto  THEN  ParallelLast)  THEN  RWO  "real-vec-dist-symmetry"  0  THEN  Auto)

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