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arXiv 2506.20175math.NT
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论椭圆曲线 $L$-函数导子的极小性

On the Minimality of the Conductor for Elliptic Curve $L$-Functions

Indian Insititute of Technology (BHU), Varanasi(印度理工学院(贝拿勒斯印度教大学))

K. Lakshmanan

AI总结:

本文证明在解析秩界中,任何满足二次函数方程和解析延拓的算术不变量必须不小于导子,从而说明导子是此类框架下的最小不变量。

摘要:

我们研究导子在椭圆曲线解析秩界中的作用。设 \(E/\mathbb{Q}\) 为椭圆曲线,导子为 \(N_E\)。考虑与 \(E\) 相关的假设二次 \(L\)-函数,它满足解析延拓、涉及算术不变量 \(\Phi(E)\) 的函数方程,并产生形如 \(\operatorname{rank}(E)\ll \log \Phi(E)\) 的秩界。利用模性定理,我们证明任何这样的不变量必须满足 \(\Phi(E)\ge N_E\)。因此,导子是在此解析框架中出现的算术不变量中的极小者。特别地,由导子产生的标准对数秩界无法通过用严格更小的不变量替换 \(N_E\) 同时保持相同的二次函数方程结构来改进。这些结果为导子在秩问题的解析方法中的特殊作用提供了结构性解释。

英文摘要:

We investigate the role of the conductor in analytic rank bounds for elliptic curves over \(\mathbb{Q}\). Let \(E/\mathbb{Q}\) be an elliptic curve with conductor \(N_E\). We consider hypothetical degree-two \(L\)-functions associated to (E) that satisfy analytic continuation, a functional equation involving an arithmetic invariant \(Φ(E)\), and yield rank bounds of the form \[ \operatorname{rank}(E)\ll \log Φ(E). \] Using the Modularity Theorem, we show that any such invariant must satisfy \[ Φ(E)\ge N_E. \] Thus the conductor is minimal among arithmetic invariants that can appear in this analytic framework. In particular, the standard logarithmic rank bounds arising from the conductor cannot be improved by replacing \(N_E\) with a strictly smaller invariant while preserving the same degree-two functional equation structure. These results provide a structural explanation for the distinguished role of the conductor in analytic approaches to the rank problem.

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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