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Proof step 3 from proof restn-apprec (previous step)

∀ m, x. restn(m, restn(n0, x)) = restn(m + n0, x) ⊦ restn(m, restn(n0, x.rest)) = restn(m + n0, x.rest)

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 1 terms: m, x.rest

Additional information

Used terms: m, x.rest