English

Homologically area-minimizing surfaces mod $v$ have at worst codimension 2 singular sets asymptotically

Differential Geometry 2024-02-01 v1

Abstract

De Lellis and coauthors have proved a sharp regularity theorem for area-minimizing currents in finite coefficient homology. They prove that area-minimizing mod vv currents are smooth outside of a singular set of codimension at least 1.1. Classical examples like triple junctions demonstrate that their result is sharp. Surprisingly, even though their regularity theorem cannot be improved for any fixed vv, if one instead fixes the homology class, then vv asymptotically one can always achieve more regularity. For any integral homology class [Σ][\Sigma] on any Riemannian manifold, we show that for vv large, any area-minimizing mod vv current in [Σmodv][\Sigma\mod v] must be an integral current, thus having a singular set of codimension at least 22 in general and of codimension at least 77 in the hypersurface case. Similar results are obtained for Plateau problems in Euclidean space. Our work is inspired by Morgan's work and based on De Lellis' and coauthors' work.

Keywords

Cite

@article{arxiv.2401.18074,
  title  = {Homologically area-minimizing surfaces mod $v$ have at worst codimension 2 singular sets asymptotically},
  author = {Zhenhua Liu},
  journal= {arXiv preprint arXiv:2401.18074},
  year   = {2024}
}
R2 v1 2026-06-28T14:33:30.515Z