4 papers
On flag-transitive automorphism groups of -designs with prime
Seyed Hassan Alavi, Ashraf Daneshkhah, Alessandro Montinaro
In this article, we study - designs with prime admitting flag-transitive and point-primitive almost simple automorphism groups with socle a…
Almost simple groups as flag-transitive automorphism groups of 2-designs with λ = 2
Seyed Hassan Alavi
In this article, we study -designs with admitting a flag-transitive almost simple automorphism group with socle a finite simple exceptional group of Lie type, and we prov…
Affine groups as flag-transitive and point-primitive automorphism groups of symmetric designs
Seyed Hassan Alavi, Mohsen Bayat, Ashraf Daneshkhah +1
In this article, we investigate symmetric designs admitting a flag-transitive and point-primitive affine automorphism group. We prove that if an automorphism group of a symmetr…
Higher-dimensional grid-imprimitive block-transitive designs
Seyed Hassan Alavi, Carmen Amarra, Ashraf Daneshkhah +2
It was shown in 1989 by Delandtsheer and Doyen that, for a -design with points and block size , a block-transitive group of automorphisms can be point-imprimitive (that i…