Abstract:
Let $G$ be a finite group and $N(G)$ be its set of conjugacy class sizes. In the present paper it is proved $G\simeq L$ if $N(G)=N(L)$, where $G$ is a finite group with trivial center and $L$ is a finite simple group of exceptional Lie type.
Key words and phrases:finite group, simple group, exceptional group of Lie type, conjugacy classes, Thompson conjecture.