فهرست نشریات علمی دسترسی آزاد ایران

‎‎Given an integer $n$‎, ‎we denote by $\mathfrak B_n$ and $\mathfrak C_n$ the classes of all groups $G$ for which the map $\phi_{n}:g\mapsto g^n$ is a monomorphism and an epimorphism of $G$‎, ‎respectively‎. ‎In this paper we give a characterization for groups in $\mathfrak B_n$ and for groups in $\mathfrak C_n$‎. ‎We also obtain an arithmetic description of the set of all integers $n$ such that a group $G$ is in $\mathfrak B_n\cap\mathfrak C_n$‎.