Many antipodes implies many neighbors
Combinatorics
2025-03-26 v1 Metric Geometry
Abstract
Suppose is a set of points in the plane with diameter , meaning for all . We show that if there are many `antipodes', these are pairs of points of with distance , then there are many neighbors, these are pairs of points that are distance . More precisely, we prove that for some universal , The inequality is very easy too prove with factor and easy with . The optimal rate might be which is attained by several examples.
Cite
@article{arxiv.2503.19792,
title = {Many antipodes implies many neighbors},
author = {Stefan Steinerberger},
journal= {arXiv preprint arXiv:2503.19792},
year = {2025}
}