The following results are proved : (1) Let L be transitive on V(G) and Abelian , then G has two disjoint maximal independent sets , and each contains a. vertices , (where a is the independence number of G) .

• 本文证明了下面的结果: 1.；设L在V(G)上可迁且为交换群；则G有两个不相交的极大独立点集。