Lifting and automorphy of reducible mod p Galois representations over global fields

N Fakhruddin, C Khare, S Patrikis - Inventiones mathematicae, 2022 - Springer
We prove the modularity of most reducible, odd representations ̄ ρ: Γ _ Q → GL _2 (k) ρ¯: Γ
Q→ GL 2 (k) with ka finite field of characteristic an odd prime p. This is an analogue of …

On deformation rings of residual Galois representations with three Jordan-Holder factors and modularity

X Huang - arXiv preprint arXiv:2308.02708, 2023 - arxiv.org
In this paper, we study Fontaine-Laffaille, self-dual deformations of a mod p non-semisimple
Galois representation of dimension n with its Jordan-Holder factors being three mutually non …

On density of modular points in pseudo-deformation rings

SV Deo - International Mathematics Research Notices, 2023 - academic.oup.com
Given a continuous, odd, reducible, and semi-simple-dimensional representation of over a
finite field of odd characteristic, we study the relation between the universal deformation ring …

𝑅= 𝑇 theorems for weight one modular forms

T Berger, K Klosin - Transactions of the American Mathematical Society, 2023 - ams.org
We prove modularity of certain residually reducible ordinary 2-dimensional $ p $-adic Galois
representations with determinant a finite order odd character $\chi $. For certain non …

Higher congruences between newforms and Eisenstein series of squarefree level

CM Hsu - Journal de théorie des nombres de Bordeaux, 2019 - jtnb.centre-mersenne.org
Soit p≥ 5 un nombre premier. Pour les formes modulaires elliptiques de poids 2 et de
niveau Γ 0 (N), où N> 6 est sans facteurs carrés, nous donnons une minoration de la …

[HTML][HTML] Irreducibility of limits of Galois representations of Saito–Kurokawa type

T Berger, K Klosin - Research in Number Theory, 2021 - Springer
We prove (under certain assumptions) the irreducibility of the limit σ 2 of a sequence of
irreducible essentially self-dual Galois representations σ k: GQ→ GL 4 (Q¯ p)(as k …