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Proof step 4 from proof ls-def (previous step)

0 < j ∧ 0 < j0, 0 < j, 0 < j0 ⊦ (rational(i, j) + rational(~ i0, j0)).num < 0 ↔ ¬ i0 * j ≤ i * j0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
0 < j0, 0 < j ⊦ (rational(i, j) + rational(~ i0, j0)).num < 0 ↔ ¬ i0 * j ≤ i * j0

Rule argument

Additional information