Problem

erdos:266

¬∀ (a : ℕ → ℕ), ((∀ (n : ℕ), a n ≥ 1) ∧ Summable fun x => 1 / ↑(a x)) → ∃ t ≥ 1, Irrational (∑' (n : ℕ), 1 / (↑(a n) + ↑t))

Open Current State

Declared status: disproved
Formalization: formalized
Subjects: irrationality
OEIS: N/A
Sources: source:erdos-problemssource:formal-conjectures
Statement: www.erdosproblems.com

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