【摘要】 就冠状系统和广义的单冠状系统,由欧拉公式给出了其边界上的2度顶点与3度顶点的关系:冠状系统G边界上的3度顶点数等于边界上的2度顶点数加6倍的非六角形内面数,然后减6;广义的单冠状系统H边界上的2度顶点数大于其3度顶点数加2.更多还原

【Abstract】 In this paper,we investigate the features of vertices with degree 2 and vertices with degree 3 on the boundary of coronoid system and generalized single coronoid system: the number of vertices with degree 3,on the boundary of coronoid system G,is equal to the number of ver-tices with degree 2 adds the number of nonhexagonal interior faces of G multiplied by 6,and minus 6;meantime,for a genera-lized single coronoid system H,the number of vertices with degree 2,on the boundary of generalized single coronoid system H,is more than or equal to the number of vertices with degree 3 adds 2.更多还原