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Families of Picard modular forms and an application to the Bloch–Kato conjecture

Part of: Algebraic groups Arithmetic algebraic geometry Abelian varieties and schemes Arithmetic problems. Diophantine geometry Discontinuous groups and automorphic forms

Published online by Cambridge University Press:  25 June 2019

Valentin Hernandez
Valentin Hernandez*
Affiliation:
Département de Mathématiques, Faculté des Sciences d’Orsay, Université Paris-Sud, Bâtiment 307, 91405 Orsay, France email valentin.hernandez@math.cnrs.fr
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Abstract

In this article we construct a p-adic three-dimensional eigenvariety for the group $U$(2,1)($E$), where $E$ is a quadratic imaginary field and $p$ is inert in $E$. The eigenvariety parametrizes Hecke eigensystems on the space of overconvergent, locally analytic, cuspidal Picard modular forms of finite slope. The method generalized the one developed in Andreatta, Iovita and Stevens [$p$-adic families of Siegel modular cuspforms Ann. of Math. (2) 181, (2015), 623–697] by interpolating the coherent automorphic sheaves when the ordinary locus is empty. As an application of this construction, we reprove a particular case of the Bloch–Kato conjecture for some Galois characters of $E$, extending the results of Bellaiche and Chenevier to the case of a positive sign.

Keywords

eigenvarietiesp-adic automorphic formsPicard modular varietiesBloch–Kato conjecturep-divisible groups

MSC classification

Primary: 11G18: Arithmetic aspects of modular and Shimura varieties 11F33: Congruences for modular and $p$-adic modular forms 14K10: Algebraic moduli, classification
Secondary: 11F55: Other groups and their modular and automorphic forms (several variables) 11G40: $L$-functions of varieties over global fields; Birch-Swinnerton-Dyer conjecture 14L05: Formal groups, $p$-divisible groups 14G35: Modular and Shimura varieties 14G22: Rigid analytic geometry
Type
Research Article
Information
Compositio Mathematica , Volume 155 , Issue 7 , July 2019 , pp. 1327 - 1401
Copyright
© The Author 2019 

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