English

Potential diagonalisability of pseudo-Barsotti-Tate representations

Number Theory 2021-08-10 v4

Abstract

Previous work of Kisin and Gee proves potential diagonalisability of two dimensional Barsotti-Tate representations of the Galois group of a finite extension K/QpK/\mathbb{Q}_p. In this paper we build upon their work by relaxing the Barsotti-Tate condition to one we call pseudo-Barsotti-Tate (which means that for certain embeddings κ:KQp\kappa:K \rightarrow \overline{\mathbb{Q}}_p we allow the κ\kappa-Hodge-Tate weights to be contained in [0,p][0,p] rather than [0,1][0,1]).

Keywords

Cite

@article{arxiv.2001.08660,
  title  = {Potential diagonalisability of pseudo-Barsotti-Tate representations},
  author = {Robin Bartlett},
  journal= {arXiv preprint arXiv:2001.08660},
  year   = {2021}
}

Comments

Presentation revised, main results remain the same

R2 v1 2026-06-23T13:19:05.459Z