摘要: 一个图G的亏格g(G)(或不可定向亏格

,也称叉冒数)是最小的整数g (或k),使得G可以嵌入到曲面S
g (或N
k)上,且边为两两不交的简单闭曲线。借助于曲面嵌入图理论中的剪开和粘合的技巧,得到了11-圈的立方体图T
11的不可定向亏格。
Abstract:
The genus
g(G) (or nonorientable genus

, is also called crosscap number) of a graph Gis the smallest number g (or k) such that Ghas an embedding in S
g (or N
k) and the edges are simple closed curves which do not intersect except at a common vertex. We obtained the nonorientable genus of the cubic graph of 11-cycle, T
11, using the technique of cut and identification in the theory of embedded graphs surfaces.