# Conjugacy class

## In group theory, equivalence class under the relation of conjugation / From Wikipedia, the free encyclopedia

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In mathematics, especially group theory, two elements and of a group are **conjugate** if there is an element in the group such that This is an equivalence relation whose equivalence classes are called **conjugacy classes**. In other words, each conjugacy class is closed under for all elements in the group.

Members of the same conjugacy class cannot be distinguished by using only the group structure, and therefore share many properties. The study of conjugacy classes of non-abelian groups is fundamental for the study of their structure.[1][2] For an abelian group, each conjugacy class is a set containing one element (singleton set).

Functions that are constant for members of the same conjugacy class are called class functions.