English

Bi-Lipschitz equivalent cones with different degrees

Algebraic Geometry 2023-09-14 v1 Complex Variables Metric Geometry

Abstract

We show that for every k3k\ge 3 there exist complex algebraic cones of dimension kk with isolated singularities, which are bi-Lipschitz and semi-algebraically equivalent but they have different degrees. We also prove that homeomorphic projective hypersurfaces with dimension greater than 2 have the same degree. In the final part of the paper, we classify links of real cones with base P1×P2.\mathbb{P}^1\times \mathbb{P}^2. As an application we give an example of three four dimensional real algebraic cones in R8\mathbb{R}^8 with isolated singularity which are semi-algebraically and bi-Lipschitz equivalent but they have non-homeomorphic bases.

Keywords

Cite

@article{arxiv.2309.07078,
  title  = {Bi-Lipschitz equivalent cones with different degrees},
  author = {Alexandre Fernandes and Zbigniew Jelonek and José Edson Sampaio},
  journal= {arXiv preprint arXiv:2309.07078},
  year   = {2023}
}

Comments

13 pages. arXiv admin note: text overlap with arXiv:2302.05387

R2 v1 2026-06-28T12:20:30.521Z