On a conjecture regarding spanning tree edge dependences of planar graphs

首发时间:2025-03-27
Abstract:Let $G$ be a connected graph with vertex set $V(G)$ and edge set $E(G)$. Let $\tau(G)$ and $\tau_G(e)$ be the number of spanning trees of $G$ and the number of spanning trees of $G$ containing $e$, respectively. The spanning tree edge density of $e$, denoted by $d_G(e)$, is defined as the ratio of $\tau_G(e)$ to $ \tau(G)$. The spanning tree edge dependence of $G$, denoted by $\mbox{dep}(G)$, is defined as the maximum density among all the edges of $G$. In 2016, Kahl proved that for any rational $0
\frac{1}{3}$ holds for all planar graphs $G$. In addition, they showed that for any rational $\frac{1}{2}
keywords: basic mathematics spanning tree spanning tree edge density spanning tree edge denpendence resistance distance necklace graph
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关于平面图的生成树边依赖的一个猜想
摘要:设$G$是连通图,其顶点集为$V(G)$,边集为$E(G)$.设$\tau(G)$和$\tau_G(e)$分别表示图$G$的生成树的数目以及图$G$中包边$e$的生成树的数目.边$e$的生成树边密度,记为$d_G(e)$,定义为$\tau_G(e)$与$\tau(G)$的比值.图$G$的生成树边依赖,为$dep(G)$,定义为图$G$中生成树边依赖的最大值.2016年,Kahl证明了对于任意满足$0
\frac{1}{3}$.此外, 他们还表明对于任意满足$\frac{1}{2}
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