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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2005.00194math.NT
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2-Selmer秩的双箭头类群的界

Bounds for 2-Selmer ranks in terms of seminarrow class groups

Hwajong Yoo, Myungjun Yu

摘要:

设$E$是由一元不可约三次多项式$F(x)$定义的数域$K$上的椭圆曲线.当$E$在$K$的所有有限素数处都是\textit{nice}时,我们用域$L=K[x]/{(F(x))}$的一个修改的理想类群的$2$ -秩来约束它的$2$ -Selmer秩,我们称之为$L$的\textit{semi-narrow class group}.然后,我们提供了几个充分条件$E$是好的有限素数。作为应用,当$K$是实二次域,$E/K$是半稳定的且$F$的判别式是全负的时,我们常常通过计算$E$的根数和$L$的窄类群的$2$ -秩来确定$E$的$2$ -Selmer秩.

英文摘要:

Let $E$ be an elliptic curve over a number field $K$ defined by a monic irreducible cubic polynomial $F(x)$. When $E$ is \textit{nice} at all finite primes of $K$, we bound its $2$-Selmer rank in terms of the $2$-rank of a modified ideal class group of the field $L=K[x]/{(F(x))}$, which we call the \textit{semi-narrow class group} of $L$. We then provide several sufficient conditions for $E$ being nice at a finite prime. As an application, when $K$ is a real quadratic field, $E/K$ is semistable and the discriminant of $F$ is totally negative, then we frequently determine the $2$-Selmer rank of $E$ by computing the root number of $E$ and the $2$-rank of the narrow class group of $L$.

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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