isomorphism [ˌaɪsə'mɔ:fɪzəm]

例句:

• Up to isomorphism, there is just one complete graph on vertices.
  在同构意义下, 几个顶点的完全图只有一个.
  
• To show that two graphs are isomorphic one must indicate an isomorphism between them.
  要证明两个图是同构的,就必须指出它们之间的一个同构.
  
• Isomorphism, in brief , means two graphs possess identical topological structures.
  所谓图的同构,就是指两个图的拓扑结构完全相同.