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Proof step 9 from proof mod-add-zero (previous step)

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

User applied rule cut formula

And obtained the following new goals

Rule argument

fma: j0 = 0

Additional information

Used simplifier rules: add-zero-rev: ⊦ 0 + i = i; from specification int-basic2%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2%add-c: ⊦ i + j = j + i; from specification int-basic2%zero-neq-01: ⊦ 0 < i → (i * j = 0 ↔ j = 0); from specification int-mult%associativity: ⊦ i * j * j0 = (i * j) * j0; from specification int-mult%commutativity: ⊦ i * j = j * i; from specification int-mult Used formulas: j0 = 0