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词汇 Character sum
分类 英语词汇 英语翻译词典
释义

Character sum

英语百科

Character sum

In mathematics, a character sum is a sum

of values of a Dirichlet character χ modulo N, taken over a given range of values of n. Such sums are basic in a number of questions, for example in the distribution of quadratic residues, and in particular in the classical question of finding an upper bound for the least quadratic non-residue modulo N. Character sums are often closely linked to exponential sums by the Gauss sums (this is like a finite Mellin transform).

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