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Step * of Lemma qmul_inv_l

∀[r:ℚ]. (1/r * r) = 1 ∈ ℚ supposing ¬(r = 0 ∈ ℚ)
BY
{ (Auto THEN RWO "qmul_com" 0 THEN Auto) }

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Latex:

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Latex:
\mforall{}[r:\mBbbQ{}].  (1/r  *  r)  =  1  supposing  \mneg{}(r  =  0)


By

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Latex:
(Auto  THEN  RWO  "qmul\_com"  0  THEN  Auto)

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