On the sharp Baer--Suzuki theorem for the $\pi$-radical

Nanying Yang, Zhenfeng Wu, Danila O. Revin +1

Let $\pi$ be a set of primes such that $|\pi |⩾2$ and $\pi$ differs from the set of all primes. Denote by $r$ the smallest prime which does not belong to $\pi$ and set $m=r$ if $r=…