English

Log $p$-divisible groups and semi-stable representations

Number Theory 2026-05-22 v4 Algebraic Geometry

Abstract

Let OK\mathscr{O}_K be a henselian DVR with field of fractions KK and residue field of characteristic p>0p>0. Let SS denote SpecOK\mathop{\mathrm{Spec}} \mathscr{O}_K endowed with the canonical log structure. We show that the generic fiber functor BTS,dlogBTKst\mathbf{BT}_{S, {\mathrm{d}}}^{\log}\to \mathbf{BT}^{\mathrm{st}}_K between the category of dual representable log pp-divisible groups over SS and the category of pp-divisible groups with semistable reduction over KK is an equivalence. If OK\mathscr{O}_K is further complete with perfect residue field and of mixed characteristic, we show that BTS,dlog\mathbf{BT}_{S, {\mathrm{d}}}^{\log} is also equivalent to the category of semistable Galois Zp\mathbb{Z}_p-representations with Hodge-Tate weights in {0,1}\{0,1\}. Finally, we show that the above equivalences respect monodromies.

Keywords

Cite

@article{arxiv.2302.11030,
  title  = {Log $p$-divisible groups and semi-stable representations},
  author = {Alessandra Bertapelle and Shanwen Wang and Heer Zhao},
  journal= {arXiv preprint arXiv:2302.11030},
  year   = {2026}
}

Comments

Minor changes in the introduction

R2 v1 2026-06-28T08:46:09.088Z