arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2107.01033math.CO
收藏

$L(n)$图是点泛圈的Hamilton连通图

$L(n)$ graphs are vertex-pancyclic and Hamilton-connected

S. Morteza Mirafzal, Sara Kouhi

摘要:

一个阶为$n>2$的图$G$是泛圈的,如果对于每个整数$l$,$G$包含一个长度为$l$的圈,且该整数具有$3 \leq l \leq n $;如果对于每个整数$3 \leq l \leq n $,$G$的每个顶点都包含在一个长度为$l$的圈中,则称该图为顶点泛圈的.一个$n > 2$阶图$G$是Hamilton连通的,如果对于任意一对不同的顶点$u$和$v$,存在一条Hamilton $u$-$v$路,即存在一条长度为$n-1$的$u$-$v$路.图$ B(n)$是具有顶点集$V=\{v \ | \ v \subset [n] , | v | \in \{ 1,2 \} \} $和边集$ E= \{ \{ v , w \} \ | \ v , w \in V , v \subset w $或$ w \subset v \}$的图,其中$[n]=\{1,2,...,n\}$。我们用$L(n)$表示$B(n)$的线图,即$L(n)=L(B(n))$。本文证明了图$L(n)$是点泛圈的,并且当$n\geq 6$时,图$L(n)$是Hamilton连通的.

英文摘要:

A graph $G$ of order $n>2$ is pancyclic if $G$ contains a cycle of length $l$ for each integer $l$ with $3 \leq l \leq n $ and it is called vertex-pancyclic if every vertex is contained in a cycle of length $l$ for every $3 \leq l \leq n $. A graph $G$ of order $n > 2$ is Hamilton-connected if for any pair of distinct vertices $u$ and $v$, there is a Hamilton $u$-$v$ path, namely, there is a $u$-$v$ path of length $n-1$. The graph $ B(n)$ is a graph with the vertex set $V=\{v \ | \ v \subset [n] , | v | \in \{ 1,2 \} \} $ and the edge set $ E= \{ \{ v , w \} \ | \ v , w \in V , v \subset w $ or $ w \subset v \}$, where $[n]=\{1,2,...,n\}$. We denote by $L(n)$ the line graph of $B(n)$, that is, $L(n)=L(B(n))$. In this paper, we show that the graph $L(n)$ is vertex-pancyclic and Hamilton-connected whenever $n\geq 6$.

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。

↑