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Proof step 3 from proof index-lookup-app (previous step)

∀ ri, kx1. ri[kx + kx1] = ri[kx] + ri[kx1] ⊦ ri[kx + kx1] = ri[kx] + ri[kx1]

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 1 terms: ri, kx1

Additional information

Used terms: ri, kx1