How to determine the isomorphismofgraphs is a difficult problem of graph theory, which has not been completely solved so far.
图同构的判定性问题是图论理论中的一个难题，至今没有得到彻底解决。
2
One helpful way to determine the isomorphismofgraphs is to use elementary operations on a graph adjacency matrix so as to transform one matrix into another.
判断图同构的一种有用的方法是对图的邻接矩阵进行初等变换，变成另一个图的邻接矩阵。
3
After all the eigenvalues have been considered, isomorphism will be determined and correspondence of vertices in isomorphic graphs can be ultimately identified.