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On equivalence of negaperiodic Golay pairs

机译:关于负周期格雷对的等价性

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Associated pairs as defined by Ito (J Algebra 234:651-663, 2000) are pairs of binary sequence of length 2t satisfying certain autocorrelation properties that may be used to construct Hadamard matrices of order 4t. More recently, Balonin and Dokovic (Inf Control Syst 5:217, 2015) use the term negaperiodic Golay pairs. We define extended negaperiodic Golay pairs and prove a one-to-one correspondence with central relative (4t, 2, 4t, 2t)-difference sets in dicyclic groups of order 8t. We present a new approach for computing negaperiodic Golay pairs up to equivalence, and determine conditions where equivalent pairs correspond to equivalent Hadamard matrices. We complete an enumeration of negaperiodic Golay pairs of length 2t for 1 <= t <= 10, and sort them into equivalence classes. Some structural properties of negaperiodic Golay pairs are derived.
机译:由Ito(J Algebra 234:651-663,2000)定义的关联对是长度为2t的二进制序列对,满足某些自相关特性,可以用于构造4t阶的Hadamard矩阵。最近,Balonin和Dokovic(Inf Control Syst 5:217,2015)使用了术语负周期格雷对。我们定义了扩展的负周期戈莱对,并证明了与8t阶双环群中的中心相对(4t,2,4t,2t)差集一一对应。我们提出了一种新的方法来计算负周期的Golay对,直到等价,并确定条件,其中等价对对应于等价的Hadamard矩阵。我们为1 <= t <= 10的长度为2t的负周期Golay对进行枚举,并将其分类为等价类。得出了负周期的Golay对的一些结构性质。

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