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arXiv 0712.0331math.NTmath.COmath.GR
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有限阿贝尔群交叉数的一个新上界

A new upper bound for the cross number of finite Abelian groups

Benjamin Girard

摘要:

在本文中,建立在其他人的早期工作,由U。Krause和C. Zahlten(处理循环群的情形),得到了任意有限阿贝尔群的小交叉数的一个新的上界.给定一个有限阿贝尔群,这个上界似乎只取决于秩和指数的不同素除子的个数。本文的主要定理允许我们,在其他后果,证明一个经典的猜想,关于交叉和小交叉数的有限阿贝尔群在至少两个不同的方向渐近成立。

英文摘要:

In this paper, building among others on earlier works by U. Krause and C. Zahlten (dealing with the case of cyclic groups), we obtain a new upper bound for the little cross number valid in the general case of arbitrary finite Abelian groups. Given a finite Abelian group, this upper bound appears to depend only on the rank and on the number of distinct prime divisors of the exponent. The main theorem of this paper allows us, among other consequences, to prove that a classical conjecture concerning the cross and little cross numbers of finite Abelian groups holds asymptotically in at least two different directions.

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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