arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2011.13547math.CO
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与有限群相关的互素序图

The co-prime order graph associated with a finite group

Xuanlong Ma, Zhonghua Wang

摘要:

设$G$是一个有限群. $G$的互质序图是顶点集为$G$的图,如果gcd $(o(x),o(y))$是$1$或素数,则两个不同的顶点$x,y$相邻,其中$o(x)$和$o(y)$分别是$x$和$y$的阶。本文刻画了所有互质序图是完备的有限群,并对所有互质序图是平面的有限群进行了分类。此外,我们还计算了循环群、二面体群和广义四元数群的互素序图的点连通性,这回答了Banerjee(2019)的一个问题。最后,证明了对于一个固定的正整数$k$,存在许多有限群的互质阶图具有(非)可定向亏格$k$ .作为应用,我们分类了所有的有限群,其互质序图具有(非)可定向亏格1和亏格2。

英文摘要:

Let $G$ be a finite group. The co-prime order graph of $G$ is the graph whose vertex set is $G$, and two distinct vertices $x,y$ are adjacent if gcd$(o(x),o(y))$ is either $1$ or a prime, where $o(x)$ and $o(y)$ are the orders of $x$ and $y$, respectively. In this paper, we characterize all finite groups whose co-prime order graphs are complete and classify all finite groups whose co-prime order graphs are planar. Also, we compute the vertex-connectivity of the co-prime order graph of a cyclic group, a dihedral group and a generalized quaternion group, which answers a question by Banerjee (2019). Finally, we prove that, for a fixed positive integer $k$, there are finitely many finite groups whose co-prime order graphs have (non)orientable genus $k$. As applications, we classify all finite groups whose co-prime order graphs have (non)orientable genus one and two.

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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