一类图按参数α（H）的分类

Classfication of a Class of Graphs by A(H)

在文［１］定义图参数的基础上给出了包括文［１］和［３］的图在内的一个无限图族参数的确定方法，从而将这个图族按ａ（Ｈ）作出了分类。

For every graph H in [1] defines a(H)=min{|V(G)|-|V(H)| |C(G)=H}constucted in [2] and [3] some Classes of graphs with a(H) =3. A criterion on value a(H)d a class d the graphs which contain the graphs in [2] and [3] is discovered.