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Proof step 2 from proof nummult-le-01 (previous step)

⊦ 0 < i ∧ j < 0 → (i * i0 ≤ j ↔ i0 ≤ (j + 1 - i) / i)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
j < i, j < 0, 0 < i, j + 1 < i ⊦ i * i0 ≤ j ↔ i0 ≤ (j + 1 - i) / i

Rule argument

Additional information

Used simplifier rules: succ-01: ⊦ i +1 = i + 1; from specification int-basic2%trans: ⊦ i < j ∧ j < j0 → i < j0; (forward) from specification int-basic1%lf-01: ⊦ i < j ∧ j < i0 → i +1 < i0; (forward) from specification int-basic1