arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2203.01530math.CO
收藏

谱半径不超过 $\sqrt{2+\sqrt{5}}$ 的符号图

On signed graphs whose spectral radius does not exceed $\sqrt{2+\sqrt{5}}$

Dijian Wang, Wenkuan Dong, Yaoping Hou, Deqiong Li

AI总结:

本文研究符号图的 Hoffman 程序,识别出所有谱半径不超过 $\sqrt{2+\sqrt{5}}$ 的符号图。

摘要:

关于与图 $G$ 关联的任意实或复方阵 $M$ 的 Hoffman 程序源于 Hoffman 对图邻接矩阵谱半径极限点不超过 $\sqrt{2+\sqrt{5}}$ 的开创性工作。符号图 $\dot{G}=(G,σ)$ 是一个序对 $(G,σ)$,其中 $G=(V,E)$ 是简单图,$σ: E(G)\rightarrow \{+1,-1\}$ 是符号函数。本文研究了符号图的 Hoffman 程序。在此,将识别出所有谱半径不超过 $\sqrt{2+\sqrt{5}}$ 的符号图。

英文摘要:

The Hoffman program with respect to any real or complex square matrix $M$ associated to a graph $G$ stems from Hoffman's pioneering work on the limit points for the spectral radius of adjacency matrices of graphs does not exceed $\sqrt{2+\sqrt{5}}$. A signed graph $\dot{G}=(G,σ)$ is a pair $(G,σ),$ where $G=(V,E)$ is a simple graph and $σ: E(G)\rightarrow \{+1,-1\}$ is the sign function. In this paper, we study the Hoffman program of signed graphs. Here, all signed graphs whose spectral radius does not exceed $\sqrt{2+\sqrt{5}}$ will be identified.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑