S-Regular Cyclic Coverings of Heawood Graph Heawood图的s-正则循环覆盖
In this paper we discuss the edge-transitive Zn-covers of Heawood graph, where n is a positive integer. 本文讨论了Heawood图的边传递的Zn-覆盖,证明了任意一个这样的Zn-覆盖都是对称图,即没有半对称的Heawood图的Zn-覆盖。
About Heawood Graph Colored with 4 Colors 关于希伍德图的四着色