中文

关于Nori基本群方案表表示的有限性结果

代数几何 2026-04-23 v2

摘要

(X,x)(X,x)为一个在次arkarkKK上的几何连通光滑射影变数。对于任意给定的秩nn,我们证明了本征有限束的基本群π1EF(X,x)\pi_{1}^{EF}(X,x)GLn\mathrm{GL}_{n}的表示在同构类数目上是有限的。等价地,可证明秩为nn的本征有限束的同构类数目是有限的。这解答了C.Gasbarri的一个问题。

关键词

引用

@article{arxiv.2601.13917,
  title  = {A finiteness result on representations of Nori's fundamental group scheme},
  author = {Xiaodong Yi},
  journal= {arXiv preprint arXiv:2601.13917},
  year   = {2026}
}

备注

The proof for Lemma 2.3 in the previous version is incorrect. In the new version the same assertion appears as Proposition 2.7 with corrected proof. The article has been reorganized. 9 pages. Comments welcome!