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erdos_1084.variants.upper_d2
Specification
Erdős showed that there is some constant $c > 0$ such that $f_2(n) < 3n - c n^{1/2}$.
Lean 4 Statement
theorem erdos_1084.variants.upper_d2 : ∃ c > (0 : ℝ), ∀ n > 0, f 2 n < 3 * n - c * sqrt n
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