$2$-designs admitting a flag-transitive automorphism group with socle $PSL(2,q)$

Hongxue Liang, Mario Galici, Zhihui Liu +3

$2$-designs admitting a flag-transitive automorphism group $G$ with socle $PSL(2,q)$, where $q=p^f\ge 4$, are investigated in both the point-primitive and point-imprimitive case…