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Step * of Lemma mul-rinv-as-rdiv

∀[y,a:ℝ].  (a * rinv(y)) = (a/y) supposing y ≠ r0
BY
{ (Unfold `rdiv` 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[y,a:\mBbbR{}].    (a  *  rinv(y))  =  (a/y)  supposing  y  \mneq{}  r0


By

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Latex:
(Unfold  `rdiv`  0  THEN  Auto)

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