English

Equiangular lines in low dimensional Euclidean spaces

Combinatorics 2020-02-20 v1

Abstract

We show that the maximum cardinality of an equiangular line system in 14 and 16 dimensions is 28 and 40, respectively, thereby solving a longstanding open problem. We also improve the upper bounds on the cardinality of equiangular line systems in 19 and 20 dimensions to 74 and 94, respectively.

Cite

@article{arxiv.2002.08085,
  title  = {Equiangular lines in low dimensional Euclidean spaces},
  author = {Gary R. W. Greaves and Jeven Syatriadi and Pavlo Yatsyna},
  journal= {arXiv preprint arXiv:2002.08085},
  year   = {2020}
}

Comments

23 pages

R2 v1 2026-06-23T13:46:35.659Z