English

Uniformization as Tannakian Reconstruction

Algebraic Geometry 2026-05-26 v1 Geometric Topology

Abstract

We formulate hyperbolic uniformization as a Tannakian reconstruction theorem. For a hyperbolic log-orbi curve C, we construct an intrinsic canonical maximal parahoric PSL2-Higgs object. A tensor-functorial parahoric non-abelian Hodge-Riemann-Hilbert correspondence identifies its Betti realization with a representation of the orbifold fundamental group whose image is the uniformizing cofinite Fuchsian lattice. This construction quasi-inverts the compactified quotient functor from cofinite Fuchsian lattices in PSL2(R) to hyperbolic log-orbi curves. We also prove a Galois enhancement, identifying finite etale covers of C with finite continuous sets for the profinite completion of the reconstructed lattice. As an application, for a one-variable complex function field F, we recover its absolute Galois group as the inverse limit of etale fundamental groups of orbifold models and identify the hyperbolic sector with a compatible Fuchsian-lattice-valued pro-system.

Keywords

Cite

@article{arxiv.2605.25468,
  title  = {Uniformization as Tannakian Reconstruction},
  author = {Xiaojin Lin and Mao Sheng},
  journal= {arXiv preprint arXiv:2605.25468},
  year   = {2026}
}

Comments

48 pages

R2 v1 2026-07-22T07:31:52.702Z