关于同余关系的几种证明

Methods of how to prove congruence relation

由陪集的定义解释问题 ,首先确定了 ρ是G中的一个等价关系 ,然后给予了

By applying the definition of coset, the author first defines that ρ is one of the equivalent relations in G, then gives the proof that ρ is a congruence relation.