Problem

erdos:250

(∀ (x : ℝ), HasSum (fun n => ↑((ArithmeticFunction.sigma 1) n) / 2 ^ n) x → Irrational x) ↔ True

Open Current State

Declared status: proved
Formalization: formalized
Subjects: number theoryirrationality
OEIS: A066766
Sources: source:erdos-problemssource:formal-conjectures
Statement: www.erdosproblems.com

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