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Proof step 18 from proof div-neg-01 (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: negate-eq: ⊦ ~ ri = ~ rj ↔ ri = rj;