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arXiv 2103.10907math.NT
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关于GL_{2n}在有限斜率Shalika家族中的p-adic L-函数

On $p$-adic $L$-functions for $GL_{2n}$ in finite slope Shalika families

Daniel Barrera Salazar, Mladen Dimitrov, Chris Williams

AI总结:

本文提出了一种新的方法,通过构造p-adic L-函数来研究GL_{2n}在有限斜率Shalika家族中的特征空间几何性质。

摘要:

在本文中,我们提出并探索了p-adic L-函数和特征空间研究之间的一种新联系。我们利用它来证明有关GL_{2n}在完全实数域F上经典点的cuspidal特征空间几何性的结果。我们还构造了围绕这些点的p-adic L-函数。我们的证明方向与已确立的方法相反:而不是利用特征空间的几何性来推导关于p-adic L-函数的结果,我们反而证明了标准p-adic L-函数的非消失性意味着在这些点上特征空间的光滑性。我们方法的关键是一组分布值函数在(paraoric)过收敛上同调群上的函数,我们通过p-adic插值古典表示论分支定律来构造这些函数。更确切地说,我们利用这些函数将一个非临界细化~π的p-adic L-函数附加到一个正则代数cuspidal自守表示π的非临界细化~π上,该表示在p处是球面的并且具有Shalika模型。我们的新paraoric分布系数使我们能够获得该构造的最优非临界斜率和增长界。当π具有正则权重且对应的p-adic伽罗瓦表示是不可约时,我们利用这些函数的非消失性来证明GL_{2n}/F的抛物线特征空间在~π上是étale的,并且在一个([F:Q]+1)维的权重空间上包含一个稠密的古典点集,这些点具有Shalika模型。在假设局部Shalika模型在坏地方的假设下,我们构造了该家族的p-adic L-函数。

英文摘要:

In this paper, we propose and explore a new connection in the study of $p$-adic $L$-functions and eigenvarieties. We use it to prove results on the geometry of the cuspidal eigenvariety for $\mathrm{GL}_{2n}$ over a totally real number field $F$ at classical points admitting Shalika models. We also construct $p$-adic $L$-functions over the eigenvariety around these points. Our proofs proceed in the opposite direction to established methods: rather than using the geometry of eigenvarieties to deduce results about $p$-adic $L$-functions, we instead show that non-vanishing of a (standard) $p$-adic $L$-function implies smoothness of the eigenvariety at such points. Key to our methods are a family of distribution-valued functionals on (parahoric) overconvergent cohomology groups, which we construct via $p$-adic interpolation of classical representation-theoretic branching laws for $\mathrm{GL}_n \times \mathrm{GL}_n \subset \mathrm{GL}_{2n}$. More precisely, we use our functionals to attach a $p$-adic $L$-function to a non-critical refinement $\tildeπ$ of a regular algebraic cuspidal automorphic representation $π$ of $\mathrm{GL}_{2n}/F$ which is spherical at $p$ and admits a Shalika model. Our new parahoric distribution coefficients allow us to obtain optimal non-critical slope and growth bounds for this construction. When $π$ has regular weight and the corresponding $p$-adic Galois representation is irreducible, we exploit non-vanishing of our functionals to show that the parabolic eigenvariety for $\mathrm{GL}_{2n}/F$ is étale at $\tildeπ$ over an $([F:\mathbb{Q}]+1)$-dimensional weight space and contains a dense set of classical points admitting Shalika models. Under a hypothesis on the local Shalika models at bad places which is empty for $π$ of level 1, we construct a $p$-adic $L$-function for the family.

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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