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Proof step 13 from proof num-neg-01 (previous step)

⊦ j = 0, rational(i, j).num + rational(~ i, j).num = 0

User applied rule cut formula

And obtained the following new goals

Proof step 14:
⊦ i = 0, j = 0, rational(i, j).num + rational(~ i, j).num = 0

Rule argument

fma: i = 0

Additional information

Used simplifier rules: numerator-zero: ⊦ rational(0, j).num = 0; Used formulas: i = 0