Some properties of rough invariant subgroups and rough quotient groups 粗糙不變子群的若干性質與粗糙商群
Congruence relation and quotient group 同余關系與商群
And , isomorphism andf homomorphism issues between the quotient groups determined by yough normal subgroups are further discussed 并討論了由粗正規子群決定的商群之間的同構和同態問題。
百科解釋
In mathematics, specifically group theory, a quotient group (or factor group) is a group obtained by aggregating similar elements of a larger group using an equivalence relation. For example, the cyclic group of addition modulo n can be obtained from the integers by identifying elements that differ by a multiple of n and defining a group structure that operates on each such class (known as a congruence class) as a single entity.