arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.09718math.NT
收藏

一类实二次域类数的下界

Lower bound for class number of certain real quadratic fields

Mohit Mishra

摘要:

设$d$是一个无平方因子的正整数,$h(d)$是实二次域$\mathbb{Q}{(\sqrt{d})}.$的类数本文给出了$h(n^2+r)$的一个显式下界,其中$r=1,4$,并利用戴德金ζ函数的特殊值建立了达到这个下界的一个等价准则.我们的界限使我们能够减少真正的二次家庭考虑Chowla和横井猜想相对较小的子家庭。我们还给出了一个等价的标准,有一个替代的证明这两个命题。并应用这些结果,得到了素数幂阶类群是循环群的一些判别准则。

英文摘要:

Let $d$ be a square-free positive integer and $h(d)$ the class number of the real quadratic field $\mathbb{Q}{(\sqrt{d})}.$ In this paper we give an explicit lower bound for $h(n^2+r)$, where $r=1,4$, and also establish an equivalent criteria to attain this lower bound in terms of special value of Dedekind zeta function. Our bounds enable us to reduce the real quadratic families considered in Chowla and Yokoi's conjecture to comparatively small subfamily. We also give an equivalent criteria for having an alternate proof of both the conjectures. Also applying our results, we obtain some criteria for class group of prime power order to be cyclic.

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。

↑