semi-group homomorphism的用法和样例：
例句
- It introduces the concept of power semigroup, studies the relations between homomorphism and congruence of power semigroup and obtains some perfect results.
摘要给出了幂半群的概念，研究了幂半群的同态与同余关系，讨论了它们之间的关系，并得到了一些理想的结果。 - The homomorphism relation between a rough algebraic structure on rough approximation space and intuitionistic fuzzy special sets is researched in details.
同时研究了粗糙近似空间上一类粗代数结构与直觉模糊特殊集的同态关系。
