Class function
Definition
A class function is one that is invariant under conjugation, i.e., given a group $G$ and a function $f$ with domain $G$, we say that $f$ is a class function if $f(h^{-1}gh)=f(g)$ for all any $g,h\in G$.
A class function is one that is invariant under conjugation, i.e., given a group $G$ and a function $f$ with domain $G$, we say that $f$ is a class function if $f(h^{-1}gh)=f(g)$ for all any $g,h\in G$.