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Erdős problem 1039

For f(z)=i=1n(zzi)f(z) = \prod_{i=1}^n (z - z_i) with all zi1|z_i| \le 1, let ρ(f)\rho(f) be the radius of the largest disc contained in {z:f(z)<1}\{z : |f(z)| < 1\}. Is ρ(f)1/n\rho(f) \gg 1/n? The worst case is now known to be Θ(1/n)\Theta(1/n), with the explicit bound ρ(f)(log2)/n\rho(f) \ge (\log 2)/n.

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sha256:9c299e95f64f9f481776d56e8933ec7c8130b3aa272bbb24dee00cfe51be8b49
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sha256:5d7df2958f74e132e4f2e7987ea2a4dbfd888d15f9084f10bcc39a91905e44f4
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sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
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sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
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sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
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2415f78e850aeee50afdca525c6f2e0ea606f207

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