Sendov猜想对每个次数 $n\ge 10^{200000}$ 成立
Sendov's conjecture holds for every degree $n\ge 10^{200000}$
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中文总结 AI 辅助
本文通过有效化Tao的紧性方法,证明Sendov猜想对所有次数至少为10^{200000}的多项式成立,给出了显式常数。
中文摘要 AI 辅助
Sendov猜想最初于1958年提出,它断言:若一个次数为 $n \geq 2$ 的复多项式 $f$ 的所有零点都在闭单位圆盘 $\{z \in \mathbb{C}: |z| \leq 1\}$ 内,那么对于 $f$ 的每一个零点 $\lambda_0$,都存在 $f$ 的一个临界点 $\zeta$,使得 $|\zeta-\lambda_0| \leq 1$。此前已知该猜想对次数 $n \leq 8$ 的多项式成立,并且对若干特殊的高次情形也成立。2022年,Tao~\cite{Tao22} 利用紧性方法、balayage(扫除)和辐角原理证明了存在一个绝对常数 $n_0$,使得Sendov猜想对所有 $n \geq n_0$ 成立。然而,Tao的论证并未给出 $n_0$ 的显式可取值。在本文中,我们将Tao的结果有效化,并证明可取 $n_0 = 10^{200000}$。
英文摘要
Sendov's conjecture, first formulated in 1958, asserts that if a complex polynomial $f$ of degree $n \geq 2$ has all its zeros in the closed unit disk ${z \in \mathbb{C} : |z| \leq 1}$, then, for every zero $λ_0$ of $f$, there exists a critical point $ζ$ of $f$ such that $|ζ-λ_0| \leq 1$. The conjecture was previously known to hold for polynomials of degree $n \leq 8$, as well as in several special higher-degree cases. In 2022, using compactness methods, balayage, and the argument principle, Tao~\cite{Tao22} proved that there exists an absolute constant $n_0$ such that Sendov's conjecture holds for all $n \geq n_0$. However, Tao's argument does not provide an explicit admissible value of $n_0$. In the present paper, we make Tao's result effective and prove that one may take $$ n_0 = 10^{200000}. $$
发表机构
- School of Mathematics and Statistics, Xi’an Jiaotong University(西安交通大学数学与统计学院)
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