arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1912.00511cs.DMmath.CO
收藏

关于支配诱导匹配的若干结果

Some Results on Dominating Induced Matchings

Saieed Akbari, Hossein Baktash, Amin Behjati, Afshin Behmaram, Mohammad Roghani

摘要:

设$G$是一个图,$G$的支配诱导匹配(DIM)是支配$G$每条边的诱导匹配.本文证明了如果图$G$有DIM,则$χ(G) \leqslant 3$ .证明了如果$G$是一个连通图,且其所有边都可划分为DIM,则$G$是正则图或双正则图,并刻画了所有边集可划分为DIM的图.另外,证明了如果$G$是一个$n$阶$r$ -正则图,且其边可划分为DIM,则$n$可被$\binom{2r - 1}{r - 1}$和$n = \binom{2r - 1}{r - 1}$整除当且仅当$G$是具有参数$r-1$,$2r-1$的Kneser图。

英文摘要:

Let $G$ be a graph, a dominating induced matching (DIM) of $G$ is an induced matching that dominates every edge of $G$. In this paper we show that if a graph $G$ has a DIM, then $χ(G) \leqslant 3$. Also, it is shown that if $G$ is a connected graph whose all edges can be partitioned into DIM, then $G$ is either a regular graph or a biregular graph and indeed we characterize all graphs whose edge set can be partitioned into DIM. Also, we prove that if $G$ is an $r$-regular graph of order $n$ whose edges can be partitioned into DIM, then $n$ is divisible by $\binom{2r - 1}{r - 1}$ and $n = \binom{2r - 1}{r - 1}$ if and only if $G$ is the Kneser graph with parameters $r-1$, $2r-1$.

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。

↑