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Proof step 2 from proof mult-split (previous step)

⊦ rational(i0, 1) * rj + rational(i1, 1) * rj = rational(i0 + i1, 1) * rj

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ ri * rj = rj * ri
Proof step 4:
⊦ rj * rational(i0, 1) + rational(i1, 1) * rj = rational(i0 + i1, 1) * rj

Rule argument

name: mult-comm rotate: F subst: [rj, ri] → [rj, rational(i0, 1)]

Additional information

Used terms: rj, rational(i0, 1)