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Proof step 5 from proof mult-a (previous step)

m0 * m * n0 + m0 * m = m0 * (m * n0 + m), ∀ m0, m. m0 * m * n0 = (m0 * m) * n0 ⊦ m0 * (m * n0 + m) = (m0 * m) * n0 + m0 * m

User applied rule insert equation

And obtained the following new goals

Proof step 6:
∀ m0, m. m0 * m * n0 = (m0 * m) * n0 ⊦ m0 * m * n0 + m0 * m = (m0 * m) * n0 + m0 * m

Rule argument

pos: left 1 flags: rotate, discard

Additional information