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erdos_252.variants.k_eq_four

Specification

`∑ σ 4 n / n!` is irrational. This is proved in [Pr22].

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Lean 4 Statement 
theorem erdos_252.variants.k_eq_four : Irrational (erdos_252_sum 4)
ID: ErdosProblems__252__erdos_252.variants.k_eq_four
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