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Step * of Lemma rv-norm_functionality

∀[rv:InnerProductSpace]. ∀[x1,x2:Point].  ||x1|| = ||x2|| supposing x1 ≡ x2
BY
{ (Auto THEN Unfold `rv-norm` 0 THEN RWO "-1" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[rv:InnerProductSpace].  \mforall{}[x1,x2:Point].    ||x1||  =  ||x2||  supposing  x1  \mequiv{}  x2


By

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Latex:
(Auto  THEN  Unfold  `rv-norm`  0  THEN  RWO  "-1"  0  THEN  Auto)

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