Pascal Boyer
We describe the connected components of Igusa's varieties of second species defined par Harris and Taylor in their book. There are in bijection with the characters of the inversible group of the maximal order of the division algebra attached to them.
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Igusa stacks for certain abelian-type Shimura varieties
本文构造了特定abel-type Shimura varieties的良好约简区域的Igusa堆栈，基于PEL数据并假设类型为(A even)或(C)且在素数p处无分支。
The stable trace formula for Igusa varieties, II
本文在底层Shimura数据中的约化群于p处拟分裂的条件下，利用Kaletha刚性内扭曲理论稳定化特征p下Igusa簇的迹公式，推广了作者此前在更严格假设下的结果。
Point Counting on Igusa Varieties for function fields
本文研究了全局 $\Gscr$-shtuka 模栈上的 Igusa 簇，计算了其上同调上的 Hecke 作用，并证明了局部 $G$-shtuka 的新结果及其在 Barsotti-Tate 群和 Shimura 簇中的应用。
Monodromy and Irreducibility of Igusa Varieties
该研究结合单值群相关工作与Hida方法的推广，确定了Hodge型Shimura簇的Igusa簇、中心叶及Newton层的不可约分支，并证明离散Hecke轨道猜想的强版本一般不成立。
Igusa Stack for some exceptional Shimura Varieties
本文通过Scholze的纤维积猜想研究元单位元Shimura变种的整数模型，证明了非阿贝尔型Shimura变种的纤维积公式，并利用几何描述推导出局部-整体兼容性结果，证明了元单位元Shimura变种上同调的通用消失定理。
Our main theorem describes the degree 0 cohomology of Igusa varieties in terms of one-dimensional automorphic representations in the setup of mod p Hodge-type Shimura varieties with hyperspecial level at p, mirroring the well known analogue for complex Shimura varieties. As an application, we obtain a completely new approach to two geometric questions. (See Sect. 1.5 for a comparison with independent results by van Hoften and Xiao via a different approach.) Firstly, we verify the discrete part of the Hecke orbit conjecture, which amounts to irreducibility of central leaves, generalizing preced…
Igusa integrals and volume asymptotics in analytic and adelic geometry
我们建立渐近公式的高度球的体积在解析品种在局部域和代数品种在数域上的顶点，有关的Mellin变换的高度函数的Igusa积分和全球几何不变的基础品种。在阿德利克设置，这涉及一般玉川措施的建设。
Igusa Stacks and the Cohomology of Shimura Varieties
本文针对所有Hodge型志村簇构造函子性Igusa叠，依托该构造及Fargues-Scholze谱作用证明其与半单局部朗兰兹对应的相容性，还在紧合情形得到新的上同调挠消失结果。
On the p-adic integration over Igusa towers of Siegel modular varieties
本文提出了一种针对Igusa塔的显式p进积分理论，用于研究模Siegel流形的互反律。
Igusa varieties are algebraic varieties that arise in the study of special fibers of Shimura varieties, and have demonstrated many applications in the Langlands program via a Langlands-Kottwitz style point-counting formula due to Shin in the case of PEL type. In this paper we formulate and prove an analogue of the Langlands-Rapoport conjecture for Igusa varieties of Hodge type, building off the work of Kisin in the case of Shimura varieties. We then use this description of the points to derive a point-counting formula for Igusa varieties of Hodge type, generalizing the fomula in PEL type of Sh…
Igusa Stacks and the Cohomology of Shimura Varieties II
本文构建了所有abelian型Shimura变分的Igusa堆栈，并推导了这些变分上同调的结论。作者证明了Fargues-Scholze局部Langlands对应与Arthur、Mok等构造的半简化局部Langlands对应在经典群A、B和D类型上一致。
Shimura curves embedded in Igusa's threefold
设O是全实数域上全不定四元数代数的极大序模。本文研究了偶维g的主极化阿贝尔簇模空间A_g中四元数乘O的轨迹Q_O，特别着重于二维情形。我们把Q_O描述为Shimura簇的Atkin-Lehner代数的并，并利用CM-域的类数计算了Q_O的不可约分支数.
$p$-adic Maass--Shimura operators on $μ$-ordinary Igusa varieties
该研究针对霍奇型志村簇，将p进整近全纯自守形式上的代数马阿斯-志村微分算子扩展到μ-普通曼托万伊古萨簇，通过p进傅里叶理论等方法得到相关代数作用，扩展、澄清并恢复了先前构造。
The completed Kirillov model and local-global compatibility for functions on Igusa varieties
本文将GL2的普通Igusa簇上的尖点函数描述为经典模形式Kirillov模型的完备化，建立弱局部-全局相容性定理，并猜想更一般情形下的Hida理论类似物。
A PEL-type Igusa Stack and the $p$-adic Geometry of Shimura Varieties
本文通过构造一个称为 Igusa 叠的 v-叠，将无限 p-级 Shimura 簇的良好约化区域描述为与仿射格拉斯曼流形的 Schubert 胞腔在 Fargues-Fontaine 曲线上的纤维积，并推广到极小紧化，同时当 Schubert 胞腔替换为有界子叠时恢复积分模型。
A geometric Jacquet--Langlands correspondence for Shimura varieties
本文提出并证明了一个关于不同 Shimura 数据（底层群互为纯内形式）的 Igusa 栈间异种同构的猜想，结合谱作用关联上同调，给出 Jacquet--Langlands 对应的几何体现。
Local Zeta Functions Supported on Analytic Submanifolds and Newton Polyhedra
p-adic域上的局部zeta函数（也称为Igusa zeta函数）与模p^{m}的同余和指数和的解的个数有关。这些zeta函数被定义为关于Haar测度的开子集和紧子集上的积分。本文引入定义在子流形上的新积分，更一般地说，定义在非退化完备交簇上的新积分，并研究它们与一些算术问题的联系，如mod p^{m}的指数和的估计。特别是，我们扩展Igusa的方法估计指数和模p ^{m}的情况下，指数和模p^{m}沿非退化光滑簇。
Local monodromy of unit root F-isocrystals from Shimura varieties
推广井草局部p进单值化定理，研究\(\mathbb{F}_p\)上光滑拟射影簇X的超收敛F - 等晶体单位根子对象局部单值化，推广到志村簇，特殊情况也有成果，还证明了阿贝尔簇赫克轨道约化的有限性。
We formulate and prove certain vanishing theorems for p-adic automorphic forms on unitary groups of arbitrary signature. The p-adic q-expansion principle for p-adic modular forms on the Igusa tower says that if the coefficients of (sufficiently many of) the q-expansions of a p-adic modular form f are zero, then f vanishes everywhere on the Igusa tower. There is no p-adic q-expansion principle for unitary groups of arbitrary signature in the literature. By replacing q-expansions with Serre-Tate expansions (expansions in terms of Serre-Tate deformation coordinates) and replacing modular forms wi…
Compactifications of subschemes of integral models of Hodge-type Shimura Varieties with Parahoric level structures
本文证明了在具有连通parahoric级结构的Hodge型Shimura簇的Kisin-Pappas整模型特殊纤维上，中心叶、Igusa簇及各类分层结构均为良好放置，推广了Lan与Stroh的相关结果。
This thesis contains some new results on the uniform rationality of Poincaré series of p-adic equivalence relations and Igusa's conjecture on exponential sums
Atkin polynomials for families of abelian varieties with real multiplication
本文通过正交多项式与帕德逼近的关系，研究了具有实乘法的阿贝尔簇族的非普通域几何，并应用超几何恒等式确定了阿特金多项式的递推关系。
On (2,2)-decomposable genus 4 Jacobians
研究亏格4 Jacobian簇的(2,2)-可分解性，利用Prym簇和Igusa四次三维体几何刻画该曲线轨迹，并分析了允许2-同源到亏格2 Jacobian簇平方的情形。
Degrees of some orthogonal Deligne--Lusztig varieties
本文证明了一类正交Deligne--Lusztig簇及其Plücker嵌入的次数公式，类比于Li在酉情形下的工作。
Some remarks on the companions conjecture for normal varieties
本文研究有限域上正规簇的同伴猜想，通过引入态射的新性质并在若干情形下加以验证，从而将猜想推广到部分奇异正规簇。
In this paper we study the geometric structure of affine Deligne-Lusztig varieties for $GL_n$ and $b$ basic. We introduce a new condition on $λ$. If this is satisfied, then the corresponding affine Deligne-Lusztig variety is the disjoint union of classical Deligne-Lusztig varieties times finite-dimensional affine spaces.
The Langlands-Kottwitz approach for some simple Shimura Varieties
我们展示了如何Langlands-Kottwitz方法可以用来确定的Hasse-Weil zeta函数的某些志村品种的半简单的本地因素。在此基础上，我们证明了Haines和Kottwitz的一个猜想。
Nontrivial algebraic cycles in the Jacobian varieties of some quotients of Fermat curves
我们得到了费马曲线的某些导数的某些调和体积值的迹映象。这就提供了一种算法，即第k个Ceresa圈所调用的代数圈在雅可比簇中不代数等价于零。
In this paper we prove the mixed Ax-Schanuel theorem for the universal abelian varieties (more generally any mixed Shimura variety of Kuga type), and give some simple applications. In particular we present an application to studying the generic rank of the Betti map.
Some cases of the Mumford--Tate conjecture and Shimura varieties
我们证明了芒福德-泰特猜想的那些阿贝尔簇在数域的扩展C附加伴随志村品种的产品简单，伴随志村品种的某些志村类型。特别是，我们证明了正交情况下的猜想（即，对于$B_n$和$D_n^R$ Shimura类型）。作为一个主要工具，我们构造了指定交换型的Shimura簇（其伴随簇为）到PEL型的酉Shimura簇的嵌入。这些构造隐含地分类了PEL类型的Shimura簇的伴随。
We use the method of Bruinier--Raum to show that symmetric formal Fourier--Jacobi series, in the cases of norm-Euclidean imaginary quadratic fields, are Hermitian modular forms. Consequently, combining a theorem of Yifeng Liu, we deduce Kudla's conjecture on the modularity of generating series of special cycles of arbitrary codimension for unitary Shimura varieties defined in these cases.
In this note, we study Shimura varieties for the groups $\mathrm{GU}(V)$, where $V$ is a Hermitian space relative to a CM extension $E/E^+$. We give a description of the supersingular locus of the fiber at a prime $ν$ over $p$ of such a Shimura variety, under the assumptions that $\mathrm{dim}_E(V) \leq 4$ and that the prime $p$ splits completely in $E^+$ and is unramified in $E$.
$2$-adic integral models of some Shimura varieties with parahoric level structure
本文在 $p=2$ 上为具有抛物层结构的阿贝尔型 Shimura 簇构造整模型，并证明 Hodge 型情形下这些模型在 Pappas-Rapoport 意义下是典范的。
Congruence relations for Shimura varieties associated to some unitary groups
本文研究了与签名为（n-1，1）的酉群相关的PEL-Shimura簇在惰性和非分歧情形下的约化.我们描述了牛顿多边形和Ekedahl-Oort分层。我们进一步研究了同构的相关模空间，并使用局部模型的一个变体给出了一个通用的描述。作为应用，我们证明了Blasius und Rogawski关于整数n为偶数时的同余关系的一个猜想.
We develop a theory of enlarged mixed Shimura varieties, putting the universal vectorial bi-extension defined by Coleman into this framework to study some functional transcendental results of Ax type. We study their bi-algebraic systems, formulate the Ax-Schanuel conjecture and explain its relation with the Ax logarithmique theorem and the Ax-Lindemann theorem which we shall prove. We also prove the whole Ax-Schanuel conjecture for the unipotent part. All these bi-algebraic and transcendental results generalize their counterparts for mixed Shimura varieties. In the end we briefly discuss about…
Questions on self maps of algebraic varieties
本文讨论了投射代数簇的自映射的一些算术和几何问题。
Modularity of Calabi-Yau varieties
本文讨论了Calabi-Yau簇的模性研究的最新进展。我们主要关注曲面和三重折叠的情况。我们还将讨论与镜像对称有关的L-函数结构的一些进展。最后，我们解决一些问题和开放的问题。
The study of affine Deligne-Lusztig varieties originally arose from arithmetic geometry, but many problems on affine Deligne-Lusztig varieties are purely Lie-theoretic in nature. This survey deals with recent progress on several important problems on affine Deligne-Lusztig varieties. The emphasis is on the Lie-theoretic aspect, while some connections and applications to arithmetic geometry will also be mentioned.
We show that the mod $p$ cohomology of a simple Shimura variety treated in Harris-Taylor's book vanishes outside a certain nontrivial range after localizing at any non-Eisenstein ideal of the Hecke algebra. In cases of low dimensions, we show the vanishing outside the middle degree.
In this paper, we consider certain union $X(μ,b)$ of affine Deligne-Lusztig varieties in the affine flag variety that arises in the study of mod-$p$ reduction of Rapoport-Zink spaces and moduli spaces of shtukas associated to a connected reductive group. Under a mild hypothesis on $μ$, but no further restrictions on the group, we compute its dimension in the case where $b$ is the maximal neutrally acceptable element.
We construct some $n$-dimensional eigenvarieties for finite slope overconvergent eigenforms over some unitary Shimura varieties with signature $(1,n-1)\times(0,n)\times\cdots\times(0,n)$ by adapting Andreatta-Iovita-Pilloni's method. We also show that there are some Galois pseudo-characters over our eigenvarieties by studying analytic continuation of finite slope eigenforms over these Shimura varieties.
We determine the Galois representations inside the $l$-adic cohomology of some unitary Shimura varieties at split places where they admit uniformization by finite products of Drinfeld upper half spaces. Our main results confirm Langlands-Kottwitz's description of the cohomology of Shimura varieties in new cases.
We study a certain class of simple abelian varieties of type $\mathrm{IV}$ (in Albert's classification) over number fields with Mumford-Tate groups of type $A$. In particular, we show that such abelian varieties have ordinary reduction away from a set of places of Dirichlet density zero, thus confirming a special case of a broader conjecture of Serre's. We also study the splitting types and Newton polygons of the reductions of the abelian varieties of this type with small dimension (nine).
Classicality for small slope overconvergent automorphic forms on some compact PEL Shimura varieties of type C
本文研究了C型紧致PEL Shimura簇的常轨迹在自守局部系统中的刚性上同调，并利用它证明了超收敛Hecke本征形经典性的一个小斜率判据。这概括了科尔曼的工作，是一个正在进行的项目的第一步，以扩大cohomological方法的古典高维志村品种。
We determine the Galois representations inside the $l$-adic cohomology of some quaternionic and related unitary Shimura varieties at ramified places. The main results generalize the previous works of Reimann and Kottwitz in this setting to arbitrary levels at $p$, and confirm the expected description of the cohomology due to Langlands and Kottwitz.
We develop Hida theory for Shimura varieties of type A without ordinary locus. In particular we show that the dimension of the space of ordinary forms is bounded independently of the weight and that there is a module of $Λ$-adic cuspidal ordinary forms which is of finite type over $Λ$, where $Λ$ is a twisted Iwasawa algebra.
We provide some general conditions which ensure that a system of inequalities involving homogeneous polynomials with coefficients in a S-adic field has nontrivial S-integral solutions. The proofs are based on the strong approximation property for Zariski-dense subgroups and adelic geometry of numbers. We give two examples of applications for systems involving quadratic and linear forms.
Some vanishing results for the rational completed cohomology of Shimura varieties
基于Bhatt在混合特征下的几乎 Kodaira 型消失结果，研究显示Shimura变种的局部解析完成上同调中，足够规则的微分权只能出现在中间度数。
This survey describe Hodge, Tate and Mumford-Tate conjectures for abelian varieties. After some preliminaries on endomorphism ring, polarization and algebraic cycles, we state the three conjectures and provide a list of know results. Finally, we explain some links between these conjectures.
Local points on P-adically uniformized Shimura varieties
使用的p-adic一致化的志村品种，我们确定，其中一些，在局部域，他们有有理点。利用这一点，我们表明，在一些新的曲线的情况下，雅可比甚至在Poonen和斯托尔的意义。
Explicit statement of a conjecture on resultantal varieties
本文将[GLZ]中关于某些与Carlitz模L-函数相关的结式簇重合的猜想，明确表述为多项式属于理想的根，并给出数值结果。
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