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Proof step 19 from proof div-neg-01 (previous step)

⊦ rj.num = 0, rj = 0r, rational(rj.denom * ri.num, rj.num * ri.denom) = ri / rj

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

name: div-def rotate: F subst: [rj, ri] → [rj, ri]

Additional information

Used simplifier rules: ⊦ i * j = j * i; Used terms: rj, ri