arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0712.0629math.NTmath.AG
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X_1(N)的模单位与尖除子类群

Modular unit and cuspidal divisor class groups of X_1(N)

Yifan Yang

摘要:

在这篇文章中,我们考虑$X_1(N)$上的模单位群$F_1^\infty(N)$,这些模单位的因子支撑在$X_0(N)$的$\infty$上的尖点上,称为$\infty$ -尖点。对于每个正整数$N$,我们将给出群$F_1^\infty(N)$的显式基。这使我们能够计算由$\infty$ -尖点的差所产生的$X_1(N)$的雅可比$J_1(N)$的有理挠子群$C_1^\infty(N)$的群结构。此外,基于数值计算,我们对正则素数$p$的$C_1^\infty(p^n)$的$p$ -准素部分的结构作了一个猜想.

英文摘要:

In this article, we consider the group $F_1^\infty(N)$ of modular units on $X_1(N)$ that have divisors supported on the cusps lying over $\infty$ of $X_0(N)$, called the $\infty$-cusps. For each positive integer $N$, we will give an explicit basis for the group $F_1^\infty(N)$. This enables us to compute the group structure of the rational torsion subgroup $C_1^\infty(N)$ of the Jacobian $J_1(N)$ of $X_1(N)$ generated by the differences of the $\infty$-cusps. In addition, based on our numerical computation, we make a conjecture on the structure of the $p$-primary part of $C_1^\infty(p^n)$ for a regular prime $p$.

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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