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Source labels openChecked July 26, 2026

Erdős ProblemsNumber theory

Erdős Problem 143: Ii

Or ∑x∈A1xlog⁡x<∞,\sum_{x \in A} \frac{1}{x \log x} < \infty,

Number theoryAMS 11

Mathematical statement

Or

∑x∈A1xlog⁡x<∞,\sum_{x \in A} \frac{1}{x \log x} < \infty,

Statement source: Erdős Problems statement material

Statement terms: Source-specific

Source-specific terms. Therefore does not assert reuse rights beyond attributed display.

Statement artifacts, not proofs

These records expose exact Lean propositions and statement-only wrappers. Defining a proposition does not supply a proof of it. A placeholder-bearing target also contains no proof. Elaboration checks syntax and types; it does not certify that a formalization perfectly captures every nuance of the informal problem.

Pinned Lean formulation 1

erdos_143.parts.ii

Canonical source
Complete statement target, proof intentionally absentLean 4
theorem erdos_143.parts.ii (A : Set ℝ) (h : WellSeparatedSet A) :    Summable fun (x : A) ↦ 1 / (x * Real.log x) := by  sorry
Statement source
Formal Conjectures
Lean version
v4.27.0
Placeholder
Present; no proof artifact
Source evidence
Pinned source index
Fidelity review
Community formulation

References

Pinned Formal Conjectures sourceformalizationerdosproblems.com/143background