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Proof step 4 from proof modeqp-copied (previous step)

i * j + j0 = i0 * j + j1, j0 < j, j1 < j, 0 ≤ j0, 0 ≤ j1, 0 < j ⊦ i = i0

User applied rule cut formula

And obtained the following new goals

Proof step 5:
i < i0, i * j + j0 = i0 * j + j1, j0 < j, j1 < j, 0 ≤ j0, 0 ≤ j1, 0 < j ⊦ i = i0
Proof step 10:
i * j + j0 = i0 * j + j1, j0 < j, j1 < j, 0 ≤ j0, 0 ≤ j1, 0 < j ⊦ i < i0, i = i0

Rule argument

fma: i < i0

Additional information

Used formulas: i < i0