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erdos_turan_1941

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Erdős and Turán [ErTu41] proved the upper bound of 1. [ErTu41] Erdős, P. and Turán, P., On a problem of Sidon in additive number theory, and on some related problems. J. London Math. Soc. (1941), 212-215.

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Lean 4 Statement 
theorem erdos_turan_1941 : ∀ (A : Set ℕ), IsSidon A → sidonUpperDensity A ≤ 1
ID: ErdosProblems__329__erdos_turan_1941
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