activity
20072025
most citedMaass spaces on U(2,2) and the Bloch-Kato conjecture for the symmetric square motive of a modular form

4 citations · 12 across the 15 of their papers we have counts for

collaborators

18 papers

math.NT2025

Klingen Eisenstein series congruences and modularity

Tobias Berger, Jim Brown, Krzysztof Klosin

We construct a mod congruence between a Klingen Eisenstein series (associated to a classical newform of weight ) and a Siegel cusp form with irreducible Galois re…

math.NT2022

theorems for weight one modular forms

Tobias Berger, Krzysztof Klosin

We prove modularity of certain residually reducible ordinary 2-dimensional -adic Galois representations with determinant a finite order odd character . For certain non-quadra…

math.NT2020

Irreducibility of limits of Galois representations of Saito-Kurokawa type

Tobias Berger, Krzysztof Klosin

We prove (under certain assumptions) the irreducibility of the limit of a sequence of irreducible essentially self-dual Galois representations $σ_k: G_{\mathbf{Q}} \to \mathr…

math.NT2019

Galois extensions and a Conjecture of Ogg

Krzysztof Klosin, Mihran Papikian

Let be a product of two distinct primes. There is an isogeny defined over between the new quotient of and the Jacobian of the…

math.NT2018

Modularity of residual Galois extensions and the Eisenstein ideal

Tobias Berger, Krzysztof Klosin

For a totally real field , a finite extension of and a Galois character unramified away from a finite set of places…

math.NT2017

On Ribet's isogeny for

Krzysztof Klosin, Mihran Papikian

Let be the Jacobian of the Shimura curve attached to the indefinite quaternion algebra over of discriminant . We study the isogenies $J_0(65)\rightarrow J…