arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1409.4239math.CO
收藏

具有非分离路径的生成树

Spanning trees with nonseparating paths

Cristina G. Fernandes, César Hernández-Vélez, Orlando Lee, José C. de Pina

摘要:

我们考虑的问题与存在的生成树的图形的属性,删除后的任何路径的树的图形仍然连接。我们证明,对于可平面图,具有此性质的树的存在性与图的Hamilton性密切相关。对于具有1-或2-顶点割的图,哈密尔顿性也起着中心作用。我们还处理生成树满足这一属性限制的路径所产生的基本周期。图的圈空间可以由任意生成树的基本圈生成,Tutte证明了,对于3-连通图,它可以由非分离圈生成。我们也对由非分离圈组成的基本基的存在感兴趣。

英文摘要:

We consider questions related to the existence of spanning trees in graphs with the property that after the removal of any path in the tree the graph remains connected. We show that, for planar graphs, the existence of trees with this property is closely related to the Hamiltonicity of the graph. For graphs with a 1- or 2-vertex cut, the Hamiltonicity also plays a central role. We also deal with spanning trees satisfying this property restricted to paths arising from fundamental cycles. The cycle space of a graph can be generated by the fundamental cycles of any spanning tree, and Tutte showed, that for a 3-connected graph, it can be generated by nonseparating cycles. We are also interested in the existence of a fundamental basis consisting of nonseparating cycles.

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。

↑