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Proof step 4 from proof negate-01 (previous step)

j ≤ 0 ⊦ rational(~ i, j) = ~ rational(i, j)

User applied rule cut formula

And obtained the following new goals

Proof step 5:
j = 0, j ≤ 0 ⊦ rational(~ i, j) = ~ rational(i, j)
Proof step 10:
j ≤ 0 ⊦ j = 0, rational(~ i, j) = ~ rational(i, j)

Rule argument

fma: j = 0

Additional information

Used formulas: j = 0