Source labels openChecked July 26, 2026

Erdős Problem 912

Prove that there exists some $c>0$ such that $h(n) \sim c \left(\frac{n}{\log n}\right)^{1/2}$ as $n\to \infty$ .

Number theory AMS 11

Mathematical statement

Prove that there exists some $c>0$ such that $h(n) \sim c \left(\frac{n}{\log n}\right)^{1/2}$ as $n\to \infty$ .

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_912

Canonical source

Complete statement target, proof intentionally absentLean 4

theorem erdos_912 : ∃ c > 0,    (fun n => (h n : ℝ)) ~[atTop] (fun n => c * (n / Real.log n) ^ (1 / 2 : ℝ)) := 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 sourceformalization erdosproblems.com/912background