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arXiv 1909.09665math.NT
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关于加性扭转、互易律和量子模形式的注记

A note on additive twists, reciprocity laws and quantum modular forms

Asbjorn Christian Nordentoft

摘要:

我们证明了尖形$L$ -函数的加性扭曲的中心值定义了Zagier意义下的量子模形式,推广了Bettin和Drappeau最近的结果.由此我们推导出尖形$L$ -函数的乘法扭转的扭转一阶矩的互易律,类似于Conrey发现的Dirichlet $L$ -函数的扭转二阶矩的互易律。进一步,我们利用相应的函数方程给出了权为2的尖点形式的$L$ -函数的加性扭曲在无穷远处的量子模性的解释.

英文摘要:

We prove that the central values of additive twists of a cuspidal $L$-function define a quantum modular form in the sense of Zagier, generalizing recent results of Bettin and Drappeau. From this we deduce a reciprocity law for the twisted first moment of multiplicative twists of cuspidal $L$-functions, similar to reciprocity laws discovered by Conrey for the twisted second moment of Dirichlet $L$-functions. Furthermore we give an interpretation of quantum modularity at infinity for additive twists of $L$-functions of weight 2 cusp forms in terms of the corresponding functional equations.

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