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Proof step 36 from proof mult-def-02 (previous step)

i3 * j2 ≠ 0 ∧ i ≠ 0, 0 < i, 1 < i, 0 < j2, 0 < i3, ∀ j2, j1, i4, i3. i→n(i3) + i→n(i4) < i→n(i * i0) + i→n(i2) → 0 < j1 ∧ 0 < j2 → rational(i3, j1) * rational(i4, j2) = rational(i3 * i4, j1 * j2) ⊦ rational(i0, i3) * rational(i2, j2) = rational(i0 * i2, i3 * j2)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: ⊦ i * j = j * i;% ⊦ i * j * j0 = (i * j) * j0;% ⊦ 0 < i → (i * j = 0 ↔ j = 0);