The Higman-Sims sporadic simple group as the automorphism group of resolvable ۳-designs

Presenting sporadic simple groups as an automorphism groups of designs and graphs is an exciting field in finite group theory.In this paper, with two different methods, we present some new resolvable simple ۳-designs with Higman-Sims sporadic simple group \rm HS as the full automorphism group.Also, we classify all block-transitive self-orthogonal designs on ۱۷۶ points with even block size that admit sporadic simple group \rm HS as an automorphism group. Furthermore, with these methods we construct some new resolvable ۳-designs on ۳۶, ۴۰, ۱۲۰ and ۱۷۶ points.

Keywords:

t-design , resolvable design , sporadic simple group