vertices

1.Take 10 golden triangles, arrange them with their sharp points touching, and you have a golden decagon, fitting perfectly within the iris of the eye, vertices neatly touching the rim.

画10个金三角，把它们的顶挨着排好，然后你就得出一个金十边形，与瞳孔中的虹膜完美地一致，十边形的最早正好在眼。

2.The kings prblems in semicomplete digraphs without vertices whose in-degree are zero and locally semicomplete digraph under some conditions are discussed chiefly in the paper.

其中,主要讨论了不包含内度为零的顶的半完全有向图和满足若干条件下的局部半完全有向图中王的问题。

3.All graphs are finite simple undirected graph with no isolated vertices in this paper. It is completed the classification of graphs on which a semidihedral group acts edge-transitively.

运用图的自同构理论，获得了关于半群边传递的图Γ的完全分类。