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Proof step 10 from proof three (previous step)

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

User applied rule cut formula

And obtained the following new goals

Proof step 11:
i * j ≤ 0, i * j = 3, j ≤ 0, j < i, 1 < i, 0 < i ⊦ j = 1

Rule argument

fma: i * j ≤ 0

Additional information

Used simplifier rules: zero-le: ⊦ 0 < i → (i * j ≤ 0 ↔ j ≤ 0);%associativity: ⊦ i * j * j0 = (i * j) * j0;%commutativity: ⊦ i * j = j * i;%zero-gels-04: ⊦ i ≤ 0 ∧ 0 ≤ j → i ≤ j; from specification int-abs Used formulas: i * j ≤ 0