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arXiv 2003.05578math.CO
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线图的符号模拟及其最小特征值

Signed analogue of line graphs and their smallest eigenvalues

Alexander L. Gavrilyuk, Akihiro Munemasa, Yoshio Sano, Tetsuji Taniguchi

摘要:

本文证明了最小特征值严格大于$-2$且最小度足够大的连通符号图与完全图是交换等价的。这是霍夫曼定理的一个有符号的类比。证明是基于我们所谓的霍夫曼极限定理,我们制定的埃尔米特矩阵,也扩展了霍夫曼图和线图的概念,设置有符号的图形。

英文摘要:

In this paper, we show that every connected signed graph with smallest eigenvalue strictly greater than $-2$ and large enough minimum degree is switching equivalent to a complete graph. This is a signed analogue of a theorem of Hoffman. The proof is based on what we call Hoffman's limit theorem which we formulate for Hermitian matrices, and also the extension of the concept of Hoffman graph and line graph for the setting of signed graphs.

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。

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