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Problem #990: Let $f=a_0+\cdots+a_dx^d\in \mathbb{C}[x]$ be a polynomial

Let $f=a_0+\cdots+a_dx^d\in \mathbb{C}[x]$ be a polynomial. Is it true that, if $f$ has roots $z_1,\ldots,z_d$ with corresponding arguments...

Problem Statement

Let $f=a_0+\cdots+a_dx^d\in \mathbb{C}[x]$ be a polynomial. Is it true that, if $f$ has roots $z_1,\ldots,z_d$ with corresponding arguments $\theta_1,\ldots,\theta_d\in [0,2\pi]$, then for all intervals $I\subseteq [0,2\pi]$\[\left\lvert (\# \theta_i \in I) - \frac{\lvert I\rvert}{2\pi}d\right\rvert \ll \left(n\log M\right)^{1/2},\]where $n$ is the number of non-zero coefficients of $f$ and\[M=\frac{\lvert a_0\rvert+\cdots +\lvert a_d\rvert}{(\lvert a_0\rvert\lvert a_d\rvert)^{1/2}}.\]
Categories: Analysis

Progress

Erdős and Turán [ErTu50] proved such an upper bound with $n$ replaced by $d$.

Source: erdosproblems.com/990 | Last verified: January 19, 2026

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