On a Simplex Inscribed in a Ball
Metric Geometry
2026-05-22 v2
Abstract
Let be the -dimensional unit ball given by the inequality , where is the standard Euclid norm in . For an -dimensional nondegenerate simplex , we denote by the ellipsoid of minimum volume which contains . Suppose , . Let be any -dimensional face of and let be the opposite -dimensional face. Denote by and the centers of gravity of and respectively. Define as the intersection point of the line passing from to with the boundary of . Let us call the face suitable if Earlier it was proved that each simplex has a suitable face of any dimension . We show the following. Let be inscribed in . If some vertex of is suitable, then there exists a suitable face of any dimension which contains this vertex.
Cite
@article{arxiv.2505.15739,
title = {On a Simplex Inscribed in a Ball},
author = {Mikhail Nevskii},
journal= {arXiv preprint arXiv:2505.15739},
year = {2026}
}
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8 pages