Reversible (m, n, k, λ1,λ2)-abelian divisible difference sets with k - λ1 nonsquare Original Research Article

This paper provides some restrictions to reversible (m, n, k, λ1, λ2)-abelian divisible difference sets (DDS) with k - λ1, nonsquare. These restrictions give more evidence for a conjecture in Ma (1990) and Arasu, Jungnickel and Pott (1990)