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 2203.12397math.CO
收藏

关于直积的独立控制

On independent domination in direct products

Kirsti Kuenzel, Douglas F. Rall

摘要:

在\cite{nr-1996} Nowakowski和Rall列出了一系列涉及几种不同图形产品的图解。特别地,他们证明了$i(G\times H) \ge i(G)i(H)$,其中$i(G)$是$G$的独立控制数,而$G\times H$是图$G$和$H$的直积。我们证明了这个猜想是错误的,事实上,我们构造了一对图,其中$\min\{i(G), i(H)\} - i(G\times H)$是任意大的。当$G$为路或圈时,我们也给出了$i(G\times K_n)$的精确值.

英文摘要:

In \cite{nr-1996} Nowakowski and Rall listed a series of conjectures involving several different graph products. In particular, they conjectured that $i(G\times H) \ge i(G)i(H)$ where $i(G)$ is the independent domination number of $G$ and $G\times H$ is the direct product of graphs $G$ and $H$. We show this conjecture is false, and, in fact, construct pairs of graphs for which $\min\{i(G), i(H)\} - i(G\times H)$ is arbitrarily large. We also give the exact value of $i(G\times K_n)$ when $G$ is either a path or a cycle.

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。

↑