English

Moduli stacks of generalized phi-modules

Number Theory 2025-12-30 v2

Abstract

Let FF be an arbitrary pp-adic field and let GG be an arbitrary reductive group over FF with Langlands dual group LG^LG. We show that the change-of-group morphism of Emerton-Gee stacks XLGXGLd\mathcal{X}_{^LG}\to\mathcal{X}_{GL_d} is relatively representable by algebraic stacks of finite presentation over SpfZp\operatorname{Spf}\mathbf{Z}_p for any embedding LGGLd^LG\to GL_d, which improves the result of \cite{Min25} which says the morphism is representable by locally Noetherian formal algebraic stacks.

Keywords

Cite

@article{arxiv.2304.05317,
  title  = {Moduli stacks of generalized phi-modules},
  author = {Zhongyipan Lin},
  journal= {arXiv preprint arXiv:2304.05317},
  year   = {2025}
}

Comments

28 pages

R2 v1 2026-06-28T10:00:04.220Z