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arXiv 1204.6705math.NT
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关于乘法群的平衡子群

On balanced subgroups of the multiplicative group

Carl Pomerance, Douglas Ulmer

摘要:

称G=(Z/dZ)^* 的子群H是平衡的,如果H的每个陪集均匀分布在G的下半部分和上半部分之间,即,具有相同数量的元素,代表在(0,d/2)和(d/2,d)中。这个概念可以应用于椭圆曲线的秩。我们给出了子群H平衡的一个简单的特征标准则,并对一个固定的整数p,研究了使得p生成的(Z/dZ)^* 的循环子群平衡的整数d的分布.

英文摘要:

A subgroup H of G=(Z/dZ)^* is called balanced if every coset of H is evenly distributed between the lower and upper halves of G, i.e., has equal numbers of elements with representatives in (0,d/2) and (d/2,d). This notion has applications to ranks of elliptic curves. We give a simple criterion in terms of characters for a subgroup H to be balanced, and for a fixed integer p, we study the distribution of integers d such that the cyclic subgroup of (Z/dZ)^* generated by p is balanced.

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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