covering graph meaning in Chinese

覆盖图

Characteristic polynomials of covering graphs
图覆盖的特征多项式
Digital products of fundamental geographic information . land cover graphs
基础地理信息数字产品.土地覆盖图
On fractional - covered graphs
因子覆盖图
In the fourth section , on the contrary we give some necessary and sufficient conditions for the existence of ( g , f ) - k - covered graph ( k = 2 , 3 ) in the last part , we put some new problems and conjectures
第四部分我们研究与第三部分相反的问题，即关于( g ， f )一k一覆盖图的存在性问题。给出并证明了一个图是( g ， f )一k一覆盖图( k二2 ， 3 )的若干充要条件。
With this method , in the present thesis , we will classify all the connected regular covering graphs of the cube satisfying the following two properties : ( 1 ) the covering transformation group is isomorphic to the elementary abelian p - group ; ( 2 ) the group of fibre - preserving automorphisms acts edge - transitively
本文中，我们用同一种方法分类立方体的正则连通覆盖图，并且满足两个条件，覆盖变换群同构于初等交换p -群且保纤维自同构群是边传递的。