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arXiv 2103.13995math.NT
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Siegel尖点形式的本原傅里叶系数的符号变化

On sign changes of primitive Fourier coefficients of Siegel cusp forms

Karam Deo Shankhadhar, Prashant Tiwari

摘要:

本文建立了同余子群上任意次数的非零Siegel尖点形式的本原傅里叶系数的符号变化的定量结果。作为二次Siegel尖点形式结果的推论,我们得到了其对角傅里叶系数的符号变化。在我们的证明过程中,我们证明了Siegel尖点形式的某些类型的Fourier-Jacobi系数和某些任意次Jacobi尖点形式的所有θ分量在同余子群上的非零性,这也是我们独立感兴趣的。

英文摘要:

In this article, we establish quantitative results for sign changes in certain subsequences of primitive Fourier coefficients of a non-zero Siegel cusp form of arbitrary degree over congruence subgroups. As a corollary of our result for degree two Siegel cusp forms, we get sign changes of its diagonal Fourier coefficients. In the course of our proofs, we prove the non-vanishing of certain type of Fourier-Jacobi coefficients of a Siegel cusp form and all theta components of certain Jacobi cusp forms of arbitrary degree over congruence subgroups, which are also of independent interest.

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