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A Note on Generalized Bent Criteria for Boolean Functions

机译:关于布尔函数的广义Bent准则的注释

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In this paper, we consider the spectra of Boolean functions with respect to the action of unitary transforms obtained by taking tensor products of the Hadamard kernel, denoted by $H$, and the nega-Hadamard kernel, denoted by $N$. The set of all such transforms is denoted by ${H, N}^{n}$. A Boolean function is said to be ${rm bent}_{4}$ if its spectrum with respect to at least one unitary transform in ${H, N}^{n}$ is flat. We obtain a relationship between bent, semibent, and ${rm bent}_{4}$ functions, which is a generalization of the relationship between bent and negabent Boolean functions proved by Parker and Pott [cf., LNCS 4893 (2007), 9–23]. As a corollary to this result, we prove that the maximum possible algebraic degree of a ${rm bent}_{4}$ function on $n$ variables is $lceil {{n} over {2}} rceil$ and, hence, solve an open problem posed by Riera and Parker [cf., IEEE-TIT 52:9 (2006), 4142–4159].
机译:在本文中,我们考虑布尔函数的谱图,该谱图是通过获取Hadamard核的张量积而获得的unit变换的作用的,表示为 $ H $ 和nega-Hadamard内核,用 $ N $ 表示。所有这些变换的集合由<公式公式类型=“ inline”> $ {H,N} ^ {n} $ 表示。如果布尔函数的频谱相对于至少一个,则布尔函数被称为 $ {rm bent} _ {4} $ $ {H,N} ^ {n} $ 中的单一变换是平坦的。我们获得了bent,semibent和 $ {rm bent} _ {4} $ 函数之间的关系,这是一个概括Parker和Pott证明了弯曲和负布尔函数之间的关系[参见,LNCS 4893(2007),9-23]。作为此结果的推论,我们证明了<公式公式类型=“ inline”> $ {rm bent} _ {4} $ $ n $ 变量上的函数是 $ lceil {{n}超过{2}} rceil $ ,从而解决了Riera和Parker提出的公开问题[cf.,IEEE-TIT 52:9(2006),4142-4159] 。

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