字典乘积有向图G1(⊙)G2是通过已知阶数较小的有向图G1和G2构造来的,这些小有向图G1和G2的拓扑结构和性质肯定影响大有向图G1(⊙)G2的拓扑结构和性质.运用群论方法,证明了有向图字典乘积的一些代数性质,如:结合律、分配律等.
Lexicographic product digraph G1(⊙)G2 is composed from some existing smaller digraphs G1 and G2 by using,in terms of graph theory,lexicographic product.Some properties and topological parameters of such large digraph G1(⊙)G2 are associated strongly with that of the corresponding smaller digraphs G1 and G2.In this paper,we study the algebraic properties of the lexicographic product of two digraphs,mainly concerning the associative,distributive and so on,by using the theory of group.