只有两对顶点的度分别相等的图序列

On the graphic sequences which only the degree of two for point is respectively equal

只有两对顶点的度分别相等的图序列称为G(2,2)图序列.以Erdǒs-Gallai定理为基础,采用分段的方法讨论了G(2,2)图序列,得到非负整数不增序列d=(d_1,d_2,…,d_n)为G(2,2)图序列的充要条件.

On the graphic sequences which only the degree of two for point is respectively equal is said a graphic sequence of G（2, 2）. This paper, based on Erdǒs-Gallai theorem, has discussed picture sequence for foundation with the method of section. It discussed the graphic sequence of G（2, 2） and obtaind a sufficient and necessary condition.