2-Coverings of classical groups

D. Bubboloni, M. S. Lucido, T. Weigel

In this paper we show that if $n\ge 5$ and $G$ is any of the groups $S{U}_n(q)$ with $n\ne 6,$ $S{p}_{2n}(q)$ with $q$ odd, ${\Omega }_{2n+1}(q),$ ${\Omega }_{2n}^{\pm }(q),$ then $G$ and the simple…