Zilin Jiang

collaborators

3 papers

math.CO2026

Classification of equiangular lines with fixed angle $arccos (1/ (1 + 22))$

Theodore Gossett, Zilin Jiang, Adam Teets +1

We determine the maximum number $N_{I^} \pm (d)$ of equiangular lines with fixed angle $arccos I^\pm$ for $I^\pm = 1/ (1 + 22)$ in $d$ -dimensional Euclidean space: $2,3,4,6,8,10,14,15,16,17,18…

math.CO2025

Beyond the classification theorem of Cameron, Goethals, Seidel, and Shult

Hricha Acharya, Zilin Jiang

In 1976, Cameron, Goethals, Seidel, and Shult classified all the graphs whose smallest eigenvalue is at least $- 2$ by relating such graphs to root systems that appear in the classi…

math.CO2025

Median eigenvalues of subcubic graphs

Hricha Acharya, Benjamin Jeter, Zilin Jiang

We show that the median eigenvalues of every connected graph of maximum degree at most three, except for the Heawood graph, are at most $1$ in absolute value, resolving open proble…

Classification of equiangular lines with fixed angle arccos(1/(1+22​))

Beyond the classification theorem of Cameron, Goethals, Seidel, and Shult

Median eigenvalues of subcubic graphs

Classification of equiangular lines with fixed angle $arccos (1/ (1 + 22))$