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erdos_252.variants.k_eq_two

Specification

`∑ σ 2 n / n!` is irrational. This is proved in [ErKa54].

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Lean 4 Statement 
theorem erdos_252.variants.k_eq_two : Irrational (erdos_252_sum 2)
ID: ErdosProblems__252__erdos_252.variants.k_eq_two
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