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Proof step 21 from proof two-identity (previous step)

⊦ i2 ^2 * j1 ^2 = (i2 * j1)^2

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: <toplevel> name: two-mult seq: ⊦ (i * j)^2 = i ^2 * j ^2 subst: [j, i] → [j1, i2] flags: <all paths>

Additional information

Used terms: j1, i2