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arXiv 2201.03270math.NTmath.RT
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Fourier-Jacobi周期与$\boldsymbol{\text{Mp}}_{2n} \times \text{Sp}_{2m}$的非缓增Gan–Gross–Prasad猜想

Fourier-Jacobi periods and the non-tempered Gan--Gross--Prasad conjecture for $\Mp_{2n} \times \Sp_{2m}$

KAIST(韩国科学技术院)

Jaeho Haan

AI总结:

本文针对两类非缓增全局$A$-参数族,分别用正则化Fourier-Jacobi周期与全局theta对应等方法,建立了辛-亚辛对的非缓增全局GGP猜想的一个方向,还得到了缓增GGP猜想的相关结果与$L$-包二分性结论。

摘要:

本文建立了辛-亚辛对$\text{Sp}_{2n} \times \text{Mp}_{2m}$与$\text{Mp}_{2n} \times \text{Sp}_{2m}$的非缓增全局Gan–Gross–Prasad(GGP)猜想的一个方向。研究聚焦于两类覆盖所有余秩的不同非缓增全局$A$-参数族,针对这类情形,标准的相对迹公式方法目前尚不可用。\n 本文采用两种不同的研究路径。第一种处理对中两个成员均为非缓增的情形,利用残量艾森斯坦级数的正则化Fourier-Jacobi周期,建立了一个互反非零定理。第二种处理仅亚辛成员为非缓增且其中央$L$-值为零的情形,主要依赖全局theta对应与显式跷跷板恒等式。\n 研究过程中,本文还建立了这些对在任意余秩下的缓增GGP猜想的一个方向,并证明了亚辛参数$[1] \boxplus M'$的全局伴随$L$-包的二分性:该包要么完全属于残量谱,要么完全属于尖点谱,这一性质由中央$L$-值$L(1/2, M')$的非零性一致决定。

英文摘要:

In this paper, we establish one direction of the non-tempered global Gan--Gross--Prasad (GGP) conjecture for the symplectic-metaplectic pairs $\Sp_{2n} \times \Mp_{2m}$ and $\Mp_{2n} \times \Sp_{2m}$. Our study focuses on two distinct families of non-tempered global $A$-parameters spanning all coranks, where standard relative trace formula methods remain unavailable. Our approach proceeds along two distinct lines of attack. First, we treat the case where both members of the pair are non-tempered, utilizing regularized Fourier-Jacobi periods of residual Eisenstein series and establishing a reciprocal non-vanishing theorem. Second, we address the setting where only the metaplectic member is non-tempered and its central $L$-value vanishes, relying heavily on the global theta correspondence and explicit seesaw identities. Along the way, we establish one direction of the tempered GGP conjecture for these pairs in arbitrary coranks, and prove a dichotomy for the global associated $L$-packet of the metaplectic parameter $[1] \boxplus M'$. We show that this packet lies entirely in the residual spectrum or entirely in the cuspidal spectrum, a behavior determined uniformly by the non-vanishing of the central $L$-value $L(1/2, M')$.

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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