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We construct three-variable $p$-adic families of Galois cohomology classes attached to Rankin convolutions of modular forms, and prove an explicit reciprocity law relating these classes to critical values of L-functions. As a consequence,…

Number Theory · Mathematics 2023-11-23 Guido Kings , David Loeffler , Sarah Livia Zerbes

We develop an explicit $p$-adic integration theory for Igusa towers of modular Siegel manifolds, which finds applications to explicit reciprocity laws.

Number Theory · Mathematics 2025-12-04 Marco Adamo Seveso

We prove that the central values of additive twists of a cuspidal $L$-function define a quantum modular form in the sense of Zagier, generalizing recent results of Bettin and Drappeau. From this we deduce a reciprocity law for the twisted…

Number Theory · Mathematics 2020-10-26 Asbjorn Christian Nordentoft

We give an explicit version of Shimura's reciprocity law for singular values of Siegel modular functions. We use this to construct the first examples of class invariants of quartic CM fields that are smaller than Igusa invariants. Our…

Number Theory · Mathematics 2024-04-23 Marco Streng

We prove an explicit reciprocity law for the Euler system attached to the spin motive of a genus 2 Siegel modular form. As consequences, we obtain one inclusion of the Iwasawa Main Conjecture for such motives, and the Bloch--Kato conjecture…

Number Theory · Mathematics 2026-04-22 David Loeffler , Sarah Livia Zerbes

This article is devoted to Kato's Euler system, which is constructed from modular unites, and to its image by the dual exponential map (so called Kato's reciprocity law). The presentation in this article is different form Kato's original…

Number Theory · Mathematics 2012-11-19 Shanwen Wang

We generalize the $p$-adic explicit reciprocity laws for balanced diagonal classes by Darmon--Rotger and Bertolini--Seveso--Venerucci to the case of geometric balanced triples $(f,g,h)$ of modular eigenforms where $f$ is a $p$-ordinary…

Number Theory · Mathematics 2026-05-05 Luca Marannino

The notion of determinant groupoid is a natural outgrowth of the theory of the Sato Grassmannian and thus well-known in mathematical physics. We briefly sketch here a version of the theory of determinant groupoids over an artinian local…

Number Theory · Mathematics 2007-05-23 Greg W. Anderson , Fernando Pablos Romo

We introduce an etale fundamental group with modulus and construct a reciprocity homomorphism from the Kato-Saito idele class group with modulus to this fundamental group. This is the K-theoretic analogue of the reciprocity for the…

Algebraic Geometry · Mathematics 2022-06-13 Rahul Gupta , Amalendu Krishna

The object of this article is to construct certain classes of arithmetically significant, holomorphic Siegel cusp forms F of genus 2, which are neither of Saito-Kurokawa type, in which case the degree 4 spinor L-function L(s, F) is…

Number Theory · Mathematics 2007-05-23 Dinakar Ramakrishnan , Freydoon Shahidi

In this paper, a strong multiplicity one theorem for Katz modular forms is studied. We show that a cuspidal Katz eigenform which admits an irreducible Galois representation is in the level and weight old space of a uniquely associated Katz…

Number Theory · Mathematics 2026-04-15 Daniel Mamo

In this article, we study deformations of conjugate self-dual Galois representations. The study has two folds. First, we prove an R=T type theorem for a conjugate self-dual Galois representation with coefficients in a finite field,…

Number Theory · Mathematics 2021-08-17 Yifeng Liu , Yichao Tian , Liang Xiao , Wei Zhang , Xinwen Zhu

We prove new cases of the inverse Galois problem by considering the residual Galois representations arising from a fixed newform. Specific choices of weight $3$ newforms will show that there are Galois extensions of $\mathbb{Q}$ with Galois…

Number Theory · Mathematics 2015-09-01 David Zywina

This article is the first article of a serie of articles on the generalization of Kato's Euler system. The main subject of this article is to construct a family of Kato's Euler systems and a family of Kato's explicit reciprocity laws over…

Number Theory · Mathematics 2012-11-20 Shanwen Wang

Let $f$ be a genus two cuspidal Siegel modular eigenform. We prove an adelic open image theorem for the compatible system of Galois representations associated to $f$, generalising the results of Ribet and Momose for elliptic modular forms.…

Number Theory · Mathematics 2026-05-01 Arvind Kumar , Moni Kumari , Ariel Weiss

The main result of the paper is a reciprocity law which proves that compatible systems of semisimple, abelian mod $p$ representations (of arbitrary dimension) of absolute Galois groups of number fields, arise from Hecke characters. In the…

Number Theory · Mathematics 2007-05-23 Chandrashekhar Khare

In this paper, we prove a minimal modularity lifting theorem for Galois representations (conjecturally) associated to Siegel modular forms of genus two which are holomorphic limits of discrete series at infinity.

Number Theory · Mathematics 2020-12-16 Frank Calegari , David Geraghty

Given a genus two curve $X: y^2 = x^5 + a x^3 + b x^2 + c x + d$, we give an explicit parametrization of all other such curves $Y$ with a specified symplectic isomorphism on three-torsion of Jacobians $\mbox{Jac}(X)[3] \cong…

Number Theory · Mathematics 2020-03-03 Frank Calegari , Shiva Chidambaram , David P. Roberts

We prove an explicit integral representation -- involving the pullback of a suitable Siegel Eisenstein series -- for the twisted standard $L$-function associated to a holomorphic vector-valued Siegel cusp form of degree $n$ and arbitrary…

Number Theory · Mathematics 2018-03-23 Ameya Pitale , Abhishek Saha , Ralf Schmidt

In this article, we study the Gross--Kudla--Schoen diagonal cycle on the triple product of Shimura curves at a place of good reduction and prove an unramified arithmetic level raising theorem for the cohomology of this triple product. We…

Number Theory · Mathematics 2026-05-15 Haining Wang
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