A New Characterization of Sporadic Groups

Zhongbi Wang, Heng Lv, Yanxiong Yan +1

Let $G$ be a finite group, $n$ a positive integer. $\pi (n)$ denotes the set of all prime divisors of $n$ and $\pi (G)=\pi (|G|)$. The prime graph $\Gamma (G)$ of $G$, defined by Grenberg and Keg…