The Shimurian BT stack is a gerbe over truncated displays
Algebraic Geometry
2026-05-28 v2 Number Theory
Abstract
We show that the mod fiber of the Shimurian stack constructed by Gardner--Madapusi is a gerbe over the corresponding stack of truncated displays. This confirms a conjecture of Drinfeld.
Cite
@article{arxiv.2510.23207,
title = {The Shimurian BT stack is a gerbe over truncated displays},
author = {Eike Lau},
journal= {arXiv preprint arXiv:2510.23207},
year = {2026}
}
Comments
Acknowledgement added