English

Minimal hypersurfaces in spheres generated by isoparametric foliations

Differential Geometry 2026-03-05 v1

Abstract

We investigate the existence of minimal hypersurfaces in Sn+1\mathbb{S}^{n+1} that are generated by the isoparametric foliation of a subsphere Sn\mathbb{S}^n. By considering a generalized rotational ansatz formed by the union of homothetic copies of isoparametric leaves, we reduce the minimal surface equation to an ordinary differential equation. We prove that this construction yields a closed embedded minimal hypersurface for any choice of isoparametric hypersurface MSnM \subset \mathbb{S}^n. The resulting hypersurfaces have the topological type S1×MS^1 \times M, extending the known examples of minimal hypertori (S1×Sk×SkS^1\times S^k\times S^k and S1×Sk×SlS^1\times S^k\times S^l) to a broader class of topologies determined by isoparametric structures.

Keywords

Cite

@article{arxiv.2603.03676,
  title  = {Minimal hypersurfaces in spheres generated by isoparametric foliations},
  author = {Junqi Lai and Guoxin Wei},
  journal= {arXiv preprint arXiv:2603.03676},
  year   = {2026}
}