On the number of perfect matchings in random polygonal chains

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-12-06 DOI:10.1515/math-2023-0146

Shouliu Wei, Yongde Feng, Xiaoling Ke, Jianwu Huang

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引用次数: 0

Abstract

Let

be a graph. A perfect matching of

is a regular spanning subgraph of degree one. Enumeration of perfect matchings of a (molecule) graph is interest in chemistry, physics, and mathematics. But the enumeration problem of perfect matchings for general graphs (even in bipartite graphs) is non-deterministic polynomial (NP)-hard. Xiao et al. [C. Xiao, H. Chen, L. Liu, Perfect matchings in random pentagonal chains, J. Math. Chem. 55 (2017), 1878–1886] have studied the problem of perfect matchings for random odd-polygonal chain (i.e., with odd polygons). In this article, we further present simple counting formulae for the expected value of the number of perfect matchings in random even-polygonal chains (i.e., with even polygons). Based on these formulae, we obtain the average values of the number for perfect matchings with respect to the set of all even-polygonal chains with

polygons.

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论随机多边形链中完全匹配的数量

设 G G 是一个图。G G 的完美匹配是阶数为 1 的正则遍历子图。枚举（分子）图的完全匹配是化学、物理和数学领域的兴趣所在。但对于一般图（即使是二方图）来说，完美匹配的枚举问题是非确定性多项式（NP）困难的。Xiao et al.Xiao, H. Chen, L. Liu, Perfect matchings in random pentagonal chains, J. Math.Chem.55 (2017), 1878-1886] 研究了随机奇多边形链（即奇多边形）的完全匹配问题。在本文中，我们进一步提出了随机偶多边形链（即偶数多边形）中完全匹配次数期望值的简单计数公式。根据这些计算公式，我们可以得到具有 n n 个多边形的所有偶多边形链的完全匹配数的平均值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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