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arXiv 1503.01170math.COcs.CC
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加法和汉明重量

Integer Addition and Hamming Weight

John Y. Kim

摘要:

研究加法对正整数的汉明重量的影响。考虑第一个$2^n$正整数,并在其中固定一个$α$。我们表明,如果$α$的二进制表示由0和1的$Θ(n)$块组成,则通过$α$加法会导致低汉明重量整数的恒定分数成为高汉明重量整数。这一结果在复杂性理论中有应用,以计算幂映射的硬度使用有界深度算术电路在$\mathbb{F}_2$。我们的结果意味着,由许多块组成的$α$供电需要指数大小,有界深度的算术电路在$\mathbb{F}_2$。

英文摘要:

We study the effect of addition on the Hamming weight of a positive integer. Consider the first $2^n$ positive integers, and fix an $α$ among them. We show that if the binary representation of $α$ consists of $Θ(n)$ blocks of zeros and ones, then addition by $α$ causes a constant fraction of low Hamming weight integers to become high Hamming weight integers. This result has applications in complexity theory to the hardness of computing powering maps using bounded-depth arithmetic circuits over $\mathbb{F}_2$. Our result implies that powering by $α$ composed of many blocks require exponential-size, bounded-depth arithmetic circuits over $\mathbb{F}_2$.

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