Polynomial point counts and odd cohomology vanishing on moduli spaces of stable curves

J Bergström, C Faber, S Payne - Annals of Mathematics, 2024 - projecteuclid.org
We compute the number of F_q-points on M_4,n for n≤3 and show that it is a polynomial in
q, using a sieve based on Hasse--Weil zeta functions. As an application, we prove that the …

Siegel modular forms of degree three and the cohomology of local systems

J Bergström, C Faber, G van der Geer - Selecta Mathematica, 2014 - Springer
We give an explicit conjectural formula for the motivic Euler characteristic of an arbitrary
symplectic local system on the moduli space A _3 of principally polarized abelian threefolds …

Arthur's multiplicity formula for certain inner forms of special orthogonal and symplectic groups

O Taïbi - J. Eur. Math. Soc.(JEMS), 2019 - ems.press
Let G be a special orthogonal group or an inner form of a symplectic group over a number
field F such that there exists a non-empty set S of real places of F at which G has discrete …

Concomitants of ternary quartics and vector-valued Siegel and Teichmüller modular forms of genus three

F Cléry, C Faber, G van der Geer - Selecta Mathematica, 2020 - Springer
We show how one can use the representation theory of ternary quartics to construct all
vector-valued Siegel modular forms and Teichmüller modular forms of degree 3. The …

Paquets d'Arthur des groupes classiques et unitaires

N Arancibia, C Mœglin, D Renard - … de la Faculté des sciences de …, 2018 - numdam.org
Soit G= G (ℝ) le groupe des points réels d'un groupe algébrique connexe réductif quasi-
déployé défini sur ℝ. Supposons de plus que G soit un groupe classique (symplectique …

[引用][C] Cohomology of moduli spaces via a result of Chenevier and Lannes

J Bergström, C Faber - Épijournal de Géométrie Algébrique, 2023 - epiga.episciences.org
We use a classification result of Chenevier and Lannes for algebraic automorphic
representations together with a conjectural correspondence with ℓ-adic absolute Galois …

The eleventh cohomology group of

S Canning, H Larson, S Payne - Forum of Mathematics, Sigma, 2023 - cambridge.org
We prove that the rational cohomology group and its image under Gysin push-forward for
tautological maps to produce many new examples of moduli spaces of stable curves with …

Discrete series multiplicities for classical groups over and level 1 algebraic cusp forms

G Chenevier, O Taïbi - Publications mathématiques de l'IHÉS, 2020 - Springer
The aim of this paper is twofold. First, we introduce a new method for evaluating the
multiplicity of a given discrete series representation in the space of level 1 automorphic …

Cuspidal cohomology classes for GL_n (Z)

G Boxer, F Calegari, T Gee - arXiv preprint arXiv:2309.15944, 2023 - arxiv.org
We prove the existence of a regular algebraic cuspidal automorphic representation $\pi $ for
$ GL_ {105}/\mathbf {Q} $ of level one and weight zero. We construct $\pi $ using symmetric …

Equidistribution, L-functions, and Sato–Tate groups

F Fité - Contemporary Mathematics, 2015 - books.google.com
In this survey note we present an approach to the generalization of Serre of the Sato-Tate
Conjecture. The reader interested in a complete account is referred to Serre's original …