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Proof step 12 from proof prod-div-less (previous step)

i0 * i1 < i0 * j, i0 * i1 = i0 * j + j0, 0 ≤ i1, 0 ≤ i0, 0 ≤ j0, j0 < j, 1 < j, 0 < j, 0 < i1, 0 < i0, i1 < j, i0 < j ⊦

User applied rule insert equation

And obtained the following new goals

Proof step 13:
i0 * j + j0 < i0 * j, i0 * i1 = i0 * j + j0, 0 ≤ i1, 0 ≤ i0, 0 ≤ j0, j0 < j, 1 < j, 0 < j, 0 < i1, 0 < i0, i1 < j, i0 < j ⊦

Rule argument

pos: left 2 flags:

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