arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.13320math.CO
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Daisy Hamming图

Daisy Hamming graphs

Tanja Gologranc, Andrej Taranenko

摘要:

最近引入了根图$G$的雏菊图,根图$r$是超立方体的一类等距子图雏菊立方体的推广。本文首先解决了\cite{Taranenko2020}中提出的问题,并刻画了根图$G$的根$r$,使得$G$关于$r$的所有菊花图在$G$中等距.我们继续研究由$X$生成的汉明图$H$的菊花图$G$,并刻画了由基数为2的$X$生成的菊花图在$H$中等距.最后,我们给出了Hamming图$K_{k_1}\Box \ldots \Box K_{k_n}$关于$0^n$的等距菊花图的一个特征.

英文摘要:

Daisy graphs of a rooted graph $G$ with the root $r$ were recently introduced as a generalization of daisy cubes, a class of isometric subgraphs of hypercubes. In this paper we first solve the problem posed in \cite{Taranenko2020} and characterize rooted graphs $G$ with the root $r$ for which all daisy graphs of $G$ with respect to $r$ are isometric in $G$. We continue the investigation of daisy graphs $G$ (generated by $X$) of a Hamming graph $H$ and characterize those daisy graphs generated by $X$ of cardinality 2 that are isometric in $H$. Finally, we give a characterization of isometric daisy graphs of a Hamming graph $K_{k_1}\Box \ldots \Box K_{k_n}$ with respect to $0^n$ in terms of an expansion procedure.

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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