arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1804.08263math.CO
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除去短路的完全图的谱刻画

Spectral characterization of the complete graph removing a path of small length

Lihuan Mao, Sebastian M. Cioabă, Wei Wang

摘要:

一个图$G$被称为\emph{determined by its spectrum},如果任何图具有相同的频谱作为$G$是同构的$G$。令$K_n \setminus P_{\ell}$是通过除去$P_\ell$的边而从$K_n$获得的图,其中$P_\ell$是长度为$\ell-1$的路,其是完全图$K_n$的子图。Cámara和Haemers~ \cite{MC}证明了$K_n \backslash P_{\ell}$是由每个$2\leq \ell \leq n$的邻接谱决定的。本文证明了该猜想对$7\leq \ell \leq9$是成立的.

英文摘要:

A graph $G$ is said to be \emph{determined by its spectrum} if any graph having the same spectrum as $G$ is isomorphic to $G$. Let $K_n \setminus P_{\ell}$ be the graph obtained from $K_n$ by removing edges of $P_\ell$, where $P_\ell$ is a path of length $\ell-1$ which is a subgraph of a complete graph $K_n$. Cámara and Haemers~\cite{MC} conjectured that $K_n \backslash P_{\ell}$ is determined by its adjacency spectrum for every $2\leq \ell \leq n$. In this paper we show that the conjecture is true for $7\leq \ell \leq9$.

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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