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We discuss the theory of Coleman families interpolating critical-slope Eisenstein series. We apply it to study degeneration phenomena at the level of Euler systems. In particular, this allows us to prove relations between Kato elements,…

Number Theory · Mathematics 2025-02-19 David Loeffler , Óscar Rivero

Euler systems are certain compatible families of cohomology classes, which play a key role in studying the arithmetic of Galois representations. We briefly survey the known Euler systems, and recall a standard conjecture of Perrin-Riou…

Number Theory · Mathematics 2021-01-27 David Loeffler , Sarah Livia Zerbes

We present a comparison between the anticyclotomic Euler system of diagonal cycles associated with the convolution of two modular forms and the cyclotomic Beilinson--Flach Euler system. This extends the seminal work of Bertolini, Darmon,…

Number Theory · Mathematics 2025-09-10 Raúl Alonso , Lois Omil-Pazos , Óscar Rivero

We show that the Euler system associated to Rankin--Selberg convolutions of modular forms, introduced in our earlier works with Lei and Kings, varies analytically as the modular forms vary in $p$-adic Coleman families. We prove an explicit…

Number Theory · Mathematics 2018-02-15 David Loeffler , Sarah Livia Zerbes

The aim of this note is to explore the Euler system of Beilinson--Kato elements in families passing through the critical $p$-stabilization of an Eisenstein series attached to two Dirichlet characters $(\psi,\tau)$. In this context, we…

Number Theory · Mathematics 2025-10-07 Javier Polo , Óscar Rivero , Ju-Feng Wu

A well-known principle states that a congruence between objects should give rise to a corresponding congruence between the special values of $L$-functions attached to these objects. In this article, using the machinery of Eisenstein…

Number Theory · Mathematics 2026-04-14 P. Narayanan , A. Raghuram

We construct an anticyclotomic Euler system for the Rankin-Selberg convolution of two modular forms, using $p$-adic families of generalized Gross-Kudla-Schoen diagonal cycles. As applications of this construction, we prove new cases of the…

Number Theory · Mathematics 2023-05-18 Raúl Alonso , Francesc Castella , Óscar Rivero

The aim of this article is to study rank-one Eisenstein cohomology for the group GL(N)/F, where F is a totally real field extension of Q. This is then used to prove rationality results for ratios of successive critical values for…

Number Theory · Mathematics 2015-06-30 Günter Harder , A. Raghuram

There are classical congruences between the class number of an imaginary quadratic field and a Bernoulli number or an Euler number. Under the BSD conjecture, Onishi obtained an elliptic generalization of these congruences, which gives…

Number Theory · Mathematics 2022-04-12 Akihiro Goto

This is an announcement of results on rank-one Eisenstein cohomology of GL(N), with N > 1 an odd integer, and algebraicity theorems for ratios of successive critical values of certain Rankin-Selberg L-functions for GL(n) x GL(n') when n is…

Number Theory · Mathematics 2011-06-15 Guenter Harder , A. Raghuram

We present a general conjecture on congruences between Hecke eigenvalues of parabolically induced and cuspidal automorphic representations of split reductive groups, modulo divisors of critical values of certain $L$-functions. We examine…

Number Theory · Mathematics 2015-10-15 Jonas Bergström , Neil Dummigan

We construct an Euler system in the cohomology of the tensor product of the Galois representations attached to two modular forms, using elements in the higher Chow groups of products of modular curves. We use this Euler system to prove a…

Number Theory · Mathematics 2014-11-25 Antonio Lei , David Loeffler , Sarah Livia Zerbes

Let $\rho$ be a conjugate-symplectic, geometric representation of the Galois group of a CM field. Under the assumption that $\rho$ is automorphic, even-dimensional, and of minimal regular Hodge--Tate type, we construct an Euler system for…

Number Theory · Mathematics 2024-10-14 Daniel Disegni

Rationality results are proved for the ratios of critical values of Rankin-Selberg L-functions of GL(n) x GL(n') over a totally imaginary field F, by studying rank-one Eisenstein cohomology for the group GL(N)/F, where N = n+n',…

Number Theory · Mathematics 2022-08-11 A. Raghuram

In this paper we set up a general Kolyvagin system machinery for Euler systems of rank r (in the sense of Perrin-Riou) associated to a large class of Galois representations, building on our previous work on Kolyvagin systems of Rubin-Stark…

Number Theory · Mathematics 2013-03-08 Kazim Buyukboduk

In this work, we define a new type of Eisenstein-like series by using Pell-Lucas numbers and call them the Pell-Lucas-Eisenstein Series. Firstly, we show that the Pell-Lucas-Eisenstein series are convergent on their domain. Afterwards we…

Number Theory · Mathematics 2022-07-15 Mine Uysal , Ilker Inam , Engin Ozkan

In this paper, we give a new explanation of congruences of Eisenstein series of level $\Gamma_1(N)$ and character $\chi$. Our approach is based on Katz's algebro-geometric explanation of $p$-adic congruences of normalized Eisenstein series…

Number Theory · Mathematics 2024-12-03 Ningchuan Zhang

We establish precise relations between Euler systems that are respectively associated to a $p$-adic representation $T$ and to its Kummer dual $T^*(1)$. Upon appropriate specialization of this general result, we are able to deduce the…

Number Theory · Mathematics 2020-03-05 David Burns , Takamichi Sano

Let $F$ be a cuspidal eigenform of even weight and trivial nebentypus, let $p$ be a prime not dividing the level of $F$, and let $\rho_F$ be the $p$-adic Galois representation attached to $F$. Assume that the $L$-function attached to the…

Number Theory · Mathematics 2022-02-15 Sam Mundy

We construct split anti-cyclotomic Euler systems for Galois representations attached to certain RACSDC automorphic representations on the group $\mathrm{GL}_n\times\mathrm{GL}_{n+1}$. As a result, we make progress towards certain rank 1…

Number Theory · Mathematics 2024-08-05 Shilin Lai , Christopher Skinner
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