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Proof step 4 from proof num-zero (previous step)

¬(i ≠ 0 ∧ 0 < j), rational(i, j).num = 0 ⊦ i = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
rational(i, j).num = 0, j ≤ 0 ⊦ i = 0

Rule argument

Additional information

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