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arXiv 1309.7842math.COcs.ITmath.IT
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差分平衡函数及其广义差集

Difference Balanced Functions and Their Generalized Difference Sets

Alexander Pott, Qi Wang

摘要:

从$F_{q^n}^*$到$F_q$的差分平衡函数与组合设计密切相关,并且自然地定义了具有理想两级自相关的$p$元序列。在文献中,所有存在的这类函数都与$d$ -齐次性有关,Gong和Song证明了差平衡函数必是$d$ -齐次的.首先利用关于两个例外子群的广义差集刻画了差平衡函数。然后我们得到了$d$ -齐次差分平衡函数的几个充要条件。特别是,我们揭示了一个意想不到的等价性之间的$d$ -齐次属性和广义差集的乘数。通过确定这些乘子,我们证明了关于$q$素数的Gong-Song猜想.证明了每一个差分平衡函数都是平衡的或平衡函数的仿射移位。

英文摘要:

Difference balanced functions from $F_{q^n}^*$ to $F_q$ are closely related to combinatorial designs and naturally define $p$-ary sequences with the ideal two-level autocorrelation. In the literature, all existing such functions are associated with the $d$-homogeneous property, and it was conjectured by Gong and Song that difference balanced functions must be $d$-homogeneous. First we characterize difference balanced functions by generalized difference sets with respect to two exceptional subgroups. We then derive several necessary and sufficient conditions for $d$-homogeneous difference balanced functions. In particular, we reveal an unexpected equivalence between the $d$-homogeneous property and multipliers of generalized difference sets. By determining these multipliers, we prove the Gong-Song conjecture for $q$ prime. Furthermore, we show that every difference balanced function must be balanced or an affine shift of a balanced function.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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