English

Super-regular polytopes in cyclotomic hypercubes

Number Theory 2024-10-21 v1 Combinatorics Metric Geometry

Abstract

For any odd prime pp and any integer N0N\ge 0, let V(p,N)\mathcal{V}(p,N) be the set of vertices of the cyclotomic box B=B(p,N)\mathscr{B} = \mathscr{B}(p,N) of edge size 2N2N and centered at the origin OO of the ring of integers Z[ω]\mathbb{Z}[\omega] of the cyclotomic field Q(ω)\mathbb{Q}(\omega), where ω=exp(2πip)\omega=\exp\big(\frac{2\pi i}{p}\big). Cyclotomic boxes represented as sets of points in the complex plane prove to have counter-intuitive super-regularity properties that are known to occur in high dimensional real hypercubes. Employing the naturally induced Euclidean-trace metric for distance measurement and letting the prime pp tend to infinity, we prove the following results. 1. Almost all triangles with vertices in V(p,N)\mathcal{V}(p,N) are almost equilateral. 2. Almost all angles VOA\angle VOA, where VV is in V(p,N)\mathcal{V}(p,N), OO is the origin, which coincides with the center of B(p,N)\mathscr{B}(p,N), and AA is fixed anywhere in B(p,N)\mathscr{B}(p,N), are right angles. 3. Almost all pyramids with base on V(p,N)\mathcal{V}(p,N) and the apex fixed anywhere in B(p,N)\mathscr{B}(p,N) are super-regular, meaning that the base has all edges and diagonals almost equal and the lateral faces are nearly isosceles triangles, each nearly equal to the others.

Keywords

Cite

@article{arxiv.2410.14473,
  title  = {Super-regular polytopes in cyclotomic hypercubes},
  author = {Cristian Cobeli and Alexandru Zaharescu},
  journal= {arXiv preprint arXiv:2410.14473},
  year   = {2024}
}

Comments

26 pages, 3 figures

R2 v1 2026-06-28T19:27:19.594Z