On conjygacy classes in groups

Marcel Herzog, Patrizia Longobardi, Mercede Maj

Let $G$ be a group. Write $G^{\ast }=G\setminus \{1\}$. An element $x$ of $G^{\ast }$ will be called deficient if $⟨x⟩<C_G(x)$ and it will be called non-deficient if $\lang…