中国科学(数学)2024,Vol.54Issue(9) :1365-1390.DOI:10.1360/SSM-2023-0293

整Chebyshev问题及其应用

The integer Chebyshev problem and its applications

王聪 吴强
中国科学(数学)2024,Vol.54Issue(9) :1365-1390.DOI:10.1360/SSM-2023-0293

整Chebyshev问题及其应用

The integer Chebyshev problem and its applications

王聪 1吴强2
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作者信息

  • 1. 西南大学数学与统计学院,重庆 400715;重庆医科大学医学信息学院,重庆.400016
  • 2. 西南大学数学与统计学院,重庆 400715
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摘要

整Chebyshev问题是要寻找一个次数不超过n的非零整系数多项式,使其在给定区间上的绝对值的最大值(即上确界范数)最小,并分析当n趋于无穷时,该最小上确界范数的变化趋势.本文概述了该问题的研究历史、方法及其推广和应用,并讨论了两类长度小于4的区间上的整Chebyshev问题.我们发现上述区间上具有最小上确界范数的n(当n足够大时)次整系数多项式的部分因子都具有一种特定的性质,并猜测该性质对任意同类区间都成立.

Abstract

The integer Chebyshev problem aims to find a nonzero polynomial of degree at most n,with integer coefficients,that has the smallest possible supremum norm on a given interval,and to analyze the behavior as n tends to infinity.In this paper,we summarize the research history and research methods of this problem and introduce its generalization and applications.Then we study this problem on two types of intervals with lengths less than 4.We find that for the polynomials with integer coefficients of degree n(when n is large enough),having small supremum norm on the above intervals,some of their factors have a certain property.We conjecture that this property holds for all intervals of these two types.

关键词

整Chebyshev问题/整超限直径/整Chebyshev多项式/关键多项式/必需因子/辅助函数

Key words

integer Chebyshev problem/integer transfinite diameter/integer Chebyshev polynomial/critical polynomial/necessary factor/auxiliary function

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基金项目

国家自然科学基金(12071375)

出版年

2024
中国科学(数学)
中国科学院

中国科学(数学)

CSTPCDCSCD北大核心
影响因子:0.221
ISSN:1674-7216
参考文献量44
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