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Zbl 1002.05006
Leung, Ka Hin; Schmidt, Bernhard
Asymptotic nonexistence of difference sets in dihedral groups. (English)
[J] J. Comb. Theory, Ser. A 99, No.2, 261-280 (2002). ISSN 0097-3165

Summary: We prove that for any primes $p_1,\dots, p_s$ there are only finitely many numbers $\prod^s_{i=1} p^{\alpha_i}_i$, $\alpha_i\in \bbfZ^+$, which can be orders of dihedral difference sets. We show that, with the possible exception of $n= 540,225$, there is no difference set of order $n$ with $1< n\le 10^6$ in any dihedral group.

MSC 2000:: *05B10 Difference sets

Keywords: dihedral difference sets

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Zentralblatt MATH Berlin [Germany]