English

Tame parahoric nonabelian Hodge correspondence on curves

Algebraic Geometry 2023-03-21 v3

Abstract

The nonabelian Hodge correspondence for vector bundles over noncompact curves is adequately described by implementing a weighted filtration on the objects involved. In order to establish a full correspondence between a Dolbeault and a de Rham space for a general complex reductive group GG, we introduce torsors given by parahoric group schemes in the sense of Bruhat--Tits. Combined with existing results on the Riemann--Hilbert correspondence for logarithmic parahoric connections, this gives a full nonabelian Hodge correspondence from Higgs bundles to fundamental group representations over a noncompact curve beyond the GLn(C)\text{GL}_n(\mathbb{C})-case.

Keywords

Cite

@article{arxiv.2205.15475,
  title  = {Tame parahoric nonabelian Hodge correspondence on curves},
  author = {Pengfei Huang and Georgios Kydonakis and Hao Sun and Lutian Zhao},
  journal= {arXiv preprint arXiv:2205.15475},
  year   = {2023}
}