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arXiv 2201.03986math.NT
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具有(球面)多项式II的签名$(n-1,1)$的二次型的θ级数

Theta Series for Quadratic Forms of Signature $(n-1,1)$ with (Spherical) Polynomials II

Christina Roehrig, Sander Zwegers

摘要:

我们推广了arXiv:2102.09329中关于签名$(n-1,1)$具有齐次多项式和球面多项式的二次型的θ级数的构造。也就是说,我们允许参数$c_1,c_2$,它定义的θ系列,并确保定义系列的收敛性,位于锥$C_Q$的边界上。这使我们能够研究几个有趣的例子,如爱森斯坦系列,模块化的形式$Γ_0(4)$出现在调查的二次多项式的一个固定的判别式,和一个模拟θ函数的顺序2连接到生成函数的Hurwitz类号码$H(8n+7)$。

英文摘要:

We generalize the construction from arXiv:2102.09329 of theta series for quadratic forms of signature $(n-1,1)$ with homogeneous and spherical polynomials. Namely, we allow that the parameters $c_1,c_2$, which define the theta series and ensure the convergence of the defining series, are located on the boundary of the cone $C_Q$. This enables us to study several interesting examples such as Eisenstein series, modular forms on $Γ_0(4)$ which appear during the investigation of quadratic polynomials of a fixed discriminant, and a mock theta function of order 2 that is connected to the generating function of the Hurwitz class numbers $H(8n+7)$.

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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