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Proof step 10 from proof negate-01 (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
j < 0 ⊦ j = 0, rational(~ i, j) = ~ rational(i, j)

Rule argument

Additional information

Used simplifier rules: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward)% ⊦ i ≠ j → (i ≤ j ↔ i < j);