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- W2037132989 abstract "A McFarland difference set is a difference set with parameters ( νv , k , λ ) = ( q d + 1 ( q d + q d − 1 + ⋯ + q + 2), q d ( q d + q d − 1 + ⋯ + q + 1), q d ( q d − 1 + q d − 2 + ⋯ + q + 1)), where q = p f and p is a prime. Examples for such difference sets can be obtained in all groups of G which contain a subgroup E ≅ EA ( q d + 1 ) such that the hyperplanes of E are normal subgroups of G . In this paper we study the structure of the Sylow p -subgroup P of an abelian group G admitting a McFarland difference set. We prove that if P is odd and P is self-conjugate modulo exp( G ), then P ≅ EA ( q d + 1 ). For p = 2, we have some strong restrictions on the exponent and the rank of P . In particular, we show that if f ⩾ 2 and 2 is self-conjugate modulo exp( G ), then exp( P ) ⩽ max {2 f − 1 , 4}. The possibility of applying our method to other difference sets has also been investigated. For example, a similar method is used to study abelian (320, 88, 24)-difference sets." @default.
- W2037132989 created "2016-06-24" @default.
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- W2037132989 date "1995-05-01" @default.
- W2037132989 modified "2023-09-26" @default.
- W2037132989 title "The structure of the abelian groups containing McFarland difference sets" @default.
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- W2037132989 doi "https://doi.org/10.1016/0097-3165(95)90096-9" @default.
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