Variants of the de Jong fundamental group
abstract: For a rigid space $X$, we answer two questions of de~Jong about the category $\mathbf{Cov}^\mathrm{adm}_X$ of coverings which are locally in the admissible topology on $X$ the disjoint union of finite \'etale coverings: we show that this class is different from the one used by de~Jong, but still gives a tame infinite Galois category. In addition, we prove that the objects of $\mathbf{Cov}^{\text{\'et}}_X$ (with the analogous definition) correspond precisely to locally constant sheaves for the pro-\'etale topology defined by Scholze.
Authors
- Piotr Achinger (ORCID: https://orcid.org/0000-0002-5815-2811)
- Marcin Lara (ORCID: https://orcid.org/0000-0002-6766-6996)
- Alex Youcis (ORCID: https://orcid.org/0000-0001-5000-6679)
Publication Details
- Journal
- American Journal of Mathematics
- Published
- 2025-10-01
- DOI
- https://doi.org/10.1353/ajm.2025.a971095
- Primary Topic
- Organometallic Complex Synthesis and Catalysis
- Type
- article
- Field-Weighted Citation Impact
- 0.00