Abstract
We study the existence of nontrivial (2m, k, λ)-difference sets in dihedral groups. Some nonexistence results are proved. In particular, we show that n = k − λ is odd and ϕ(n)/n < 1/2. Finally, a computer search shows that, except 5 undecided cases, no nontrivial difference set exists in dihedral groups for n ≤ 106.
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Communicated by D. Jungnickel
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Leung, K.H., Ma, S.L. & Wong, Y.L. Difference sets in dihedral groups. Des Codes Crypt 1, 333–338 (1991). https://doi.org/10.1007/BF00124608
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DOI: https://doi.org/10.1007/BF00124608