We study those $(2,m,n)$-groups which are almost simple and for which the absolute value of the Euler characteristic is a product of two prime powers. All such groups which are not isomorphic to $PSL_2(q)$ or $PGL_2(q)$ are completely classified.
|Journal||The Electronic Journal of Combinatorics|
|Publication status||Published - 2013|
- 20F05 (primary), 20D05, 05C10