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Erdős problem 329

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Erdős Problem 329. Let A ⊆ ℕ be a Sidon set. How large can lim sup_{N → ∞} |A ∩ {1,…,N}| / N^{1/2} be?

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FormalConjectures/ErdosProblems/

329.lean

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Erdős Problem 329. Let A ⊆ ℕ be a Sidon set. How large can lim sup_{N → ∞} |A ∩ {1,…,N}| / N^{1/2} be?

FormalConjectures/ErdosProblems/329.leanErdos329.erdos_3291 lineExact file
sSup {x | ∃ A, ∃ (_ : IsSidon A), Erdos329.sidonUpperDensity A = x} = sorry
OpenStatement only, no proof