arXivDaily arXiv每日学术速递 周一至周五更新
arXiv math/0004190math.NT
收藏

实二次函数域理想类数的界

Bounds of ideal class numbers of real quadratic function fields

Kunpeng Wang, Xianke Zhang

摘要:

利用函数连分式理论$ \sqrt D $给出了$k={\bf F}_q(T)$上一般实二次函数域$K=k(\sqrt D)$的类数$h(D)$的下界.对于实二次函数域$K$的五个系列,更明确地给出了$h(D)$的界,例如,如果$ D=F^2+c,$ \mbox{} \hspace{0.1cm}则$ h(D)\geq {deg}F /{deg} P;$ \hspace{0.1cm}如果$D=(SG)^2+cS, $则$ h(D)\geq {deg}S / {deg} P; $如果$D=(A^m+a)^2+A, $则$ h(D)\geq {deg}A / {deg} P, $其中$P$是不可约多项式,在$K, c\in {\bf F}_q$中分裂是任意常数。此外,还发现六种类型的二次函数域具有有界且大于一的理想类数。二次函数域,理想类数,函数的连分式

英文摘要:

The theory of continued fractions of functions $ \sqrt D $ is used to give lower bound for class numbers $h(D)$ of general real quadratic function fields $K=k(\sqrt D)$ over $k={\bf F}_q(T)$. For five series of real quadratic function fields $K$, the bounds of $h(D)$ are given more explicitly, e.g., if $ D=F^2+c,$ \mbox{}\hspace{0.1cm} then $ h(D)\geq {deg}F /{deg} P;$ \hspace{0.1cm} if $D=(SG)^2+cS, $ then $ h(D)\geq {deg}S / {deg} P; $ if $D=(A^m+a)^2+A, $ then $ h(D)\geq {deg}A / {deg} P, $ where $P$ is irreducible polynomial splitting in $K, c\in {\bf F}_q$ is any constant. In addition, six types of quadratic function fields are found to have ideal class numbers bounded and bigger than one. {\bf keywords:} quadratic function field, ideal class number, continued fractions of functions

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。

↑