arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1409.7983math.CO
收藏

超立方体中树的饱和数

Saturation Number of Trees in the Hypercube

Kavish Gandhi, Chiheon Kim

摘要:

一个图$H^{\prime}$是$(H, G)$饱和的,如果它不含$G$,并且添加不在$H^{\prime}$中的$H$的任何边都会创建$G$的副本.饱和数$sat(H, G)$是$(H, G)$ -饱和图中的最小边数。研究了$n$维超立方体$Q_n$中树$T$的饱和数的界.我们首先提出了一个一般的下界的饱和数的基础上的最小程度的非叶。从那里,我们提出了两个一般的方法来构建$T$饱和子图的$Q_n$,并证明了非平凡的上界的特定类型的树,包括道路,广义星,和某些毛毛虫的限制下,最小程度的直径。

英文摘要:

A graph $H^{\prime}$ is $(H, G)$-saturated if it is $G$-free and the addition of any edge of $H$ not in $H^{\prime}$ creates a copy of $G$. The saturation number $sat(H, G)$ is the minimum number of edges in a $(H, G)$-saturated graph. We investigate bounds on the saturation number of trees $T$ in the $n$-dimensional hypercube $Q_n$. We first present a general lower bound on the saturation number based on the minimum degree of non-leaves. From there, we suggest two general methods for constructing $T$-saturated subgraphs of $Q_n$, and prove nontrivial upper bounds for specific types of trees, including paths, generalized stars, and certain caterpillars under a restriction on minimum degree with respect to diameter.

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。

↑