l1 球的非中心部分

IF 1 3区 数学 Q3 MATHEMATICS, APPLIED Advances in Applied Mathematics Pub Date : 2024-07-09 DOI:10.1016/j.aam.2024.102737
Hermann König
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引用次数: 0

摘要

如果超平面到原点的固定距离在 13 和 12 之间,我们将确定 l1n 球的最大非中心超平面截面。对于 n≥4,最大截面平行于 (n-1) 维坐标平面。我们还研究了复数 l∞2 球的非中心截面,其公式比实数情况更复杂。此外,极值与实数情况也有部分不同。
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Non-central sections of the l1-ball

We determine the maximal non-central hyperplane sections of the l1n-ball if the fixed distance of the hyperplane to the origin is between 13 and 12. This adds to a result of Liu and Tkocz who considered the distance range between 12 and 1. For n4, the maximal sections are parallel to the (n1)-dimensional coordinate planes. We also study non-central sections of the complex l2-ball, where the formulas are more complicated than in the real case. Also, the extrema are partially different compared to the real case.

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来源期刊
Advances in Applied Mathematics
Advances in Applied Mathematics 数学-应用数学
CiteScore
2.00
自引率
9.10%
发文量
88
审稿时长
85 days
期刊介绍: Interdisciplinary in its coverage, Advances in Applied Mathematics is dedicated to the publication of original and survey articles on rigorous methods and results in applied mathematics. The journal features articles on discrete mathematics, discrete probability theory, theoretical statistics, mathematical biology and bioinformatics, applied commutative algebra and algebraic geometry, convexity theory, experimental mathematics, theoretical computer science, and other areas. Emphasizing papers that represent a substantial mathematical advance in their field, the journal is an excellent source of current information for mathematicians, computer scientists, applied mathematicians, physicists, statisticians, and biologists. Over the past ten years, Advances in Applied Mathematics has published research papers written by many of the foremost mathematicians of our time.
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