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Step * of Lemma rv-sub-same

∀[rv:RealVectorSpace]. ∀[x:Point].  x - x ≡ 0
BY
{ (Auto THEN RealVecEqual THEN Auto) }

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Latex:

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Latex:
\mforall{}[rv:RealVectorSpace].  \mforall{}[x:Point].    x  -  x  \mequiv{}  0


By

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Latex:
(Auto  THEN  RealVecEqual  THEN  Auto)

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