arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1910.01807math.CO
收藏

关于$\ell$-距离平衡乘积图

On $\ell$-distance balanced product graphs

Janja Jerebic, Sandi Klavžar, Gregor Rus

摘要:

一个图$G$是$\ell$-距离平衡的,如果对于$G$中距离$\ell$的每对顶点$x$和$y$,距离$x$比距离$y$近的顶点的数目等于距离$y$比距离$x$近的顶点的数目。一个完整的$\ell$距离平衡电晕产品的特性和$\ell \ge 3$的词典产品的特性,从而补充了已知的结果$\ell\in \{1,2\}$和纠正早期的相关断言。给出了$H$上保证$K_n \,\square\, H$是$\ell$-距离平衡的一个充分条件,并证明了如果$K_n \,\square\, H$是$\ell$-距离平衡的,则$H$是一个$\ell$-距离平衡图.一个已知的$1$-距离平衡图的特征被扩展到$\ell$-距离平衡图,再次纠正了先前声称的断言。

英文摘要:

A graph $G$ is $\ell$-distance-balanced if for each pair of vertices $x$ and $y$ at distance $\ell$ in $G$, the number of vertices closer to $x$ than to $y$ is equal to the number of vertices closer to $y$ than to $x$. A complete characterization of $\ell$-distance-balanced corona products is given and a characterization of lexicographic products for $\ell \ge 3$, thus complementing known results for $\ell\in \{1,2\}$ and correcting an earlier related assertion. A sufficient condition on $H$ which guarantees that $K_n \,\square\, H$ is $\ell$-distance-balanced is given and it is proved that if $K_n \,\square\, H$ is $\ell$-distance-balanced, then $H$ is an $\ell$-distance-balanced graph. A known characterization of $1$-distance-balanced graphs is extended to $\ell$-distance-balanced graphs, again correcting an earlier claimed assertion.

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。

↑