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Mathematics > Algebraic Geometry

arXiv:2406.12766 (math)
[Submitted on 18 Jun 2024 (v1) , last revised 25 Apr 2025 (this version, v2)]

Title: On a p-adic version of Narasimhan and Seshadri's theorem

Title: 关于p进制Narasimhan和Seshadri定理的一个版本

Authors:Fabrizio Andreatta
Abstract: Consider a smooth projective curve C of genus g over a complete discrete valuation field of characteristic 0 and residue field \Fbar_p. Motivated by Narasimhan and Seshadri's theorem, Faltings asked whether all semistable vector bundles of degree 0 over C_{\C_p} are in the image of the p-adic Simpson correspondence. Works of Deninger-Werner and Xu show that this is equivalent for the vector bundle to having potentially strongly semistable reduction. We prove that if C has good reduction, p>r(r-1) (g-1) and we consider a vector bundle of rank r with stable reduction, the conditions of having potentially strongly semistable reduction and of having strongly semistable reduction are equivalent. In particular, we provide a negative answer to Faltings' question
Abstract: 考虑一个在特征为0的完备离散赋值域上的光滑射影曲线C,其剩余域为\Fbar _p。 受Narasimhan和Seshadri定理的启发,Faltings询问是否所有度为0的C_{\C _p}上的半稳定向量丛都在p进Simpson对应之下。 Deninger-Werner和Xu的工作表明,这等价于该向量丛具有潜在强半稳定约化。 我们证明,如果C有良约化,p>r(r-1)(g-1),并且我们考虑一个秩为r且具有稳定约化的向量丛,则具有潜在强半稳定约化和具有强半稳定约化的条件是等价的。 特别地,我们对Faltings的问题提供了否定回答。
Comments: Using the paper "Higgs bundles over the good reduction of a quaternionic Shimura curve" by Mao Sheng, Jiajin Zhang, Kang Zuo, one can constrct a counterexample to the main claim of the paper
Subjects: Algebraic Geometry (math.AG) ; Number Theory (math.NT)
Cite as: arXiv:2406.12766 [math.AG]
  (or arXiv:2406.12766v2 [math.AG] for this version)
  https://doi.org/10.48550/arXiv.2406.12766
arXiv-issued DOI via DataCite

Submission history

From: Fabrizio Andreatta [view email]
[v1] Tue, 18 Jun 2024 16:32:45 UTC (44 KB)
[v2] Fri, 25 Apr 2025 10:37:43 UTC (1 KB)
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