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Proof step 5 from proof three (previous step)

i * j = 3, 0 < i, 1 < i ⊦ i = 3 ∧ j = 1, 3 ≤ i ∧ 1 < j

User applied rule cut formula

And obtained the following new goals

Proof step 6:
j ≤ 1, i * j = 3, 0 < i, 1 < i ⊦ i = 3 ∧ j = 1, 3 ≤ i ∧ 1 < j
Proof step 12:
i * j = 3, 0 < i, 1 < i ⊦ j ≤ 1, i = 3 ∧ j = 1, 3 ≤ i ∧ 1 < j

Rule argument

fma: j ≤ 1

Additional information

Used formulas: j ≤ 1