96 citations · 298 across the 25 of their papers we have counts for
4 papers · 1 filter
Equiangular line systems and switching classes containing regular graphs
Gary R. W. Greaves
We develop the theory of equiangular lines in Euclidean spaces. Our focus is on the question of when a Seidel matrix having precisely three distinct eigenvalues has a regular graph…
On the clique number of a strongly regular graph
Gary R. W. Greaves, Leonard H. Soicher
We determine new upper bounds for the clique numbers of strongly regular graphs in terms of their parameters. These bounds improve on the Delsarte bound for infinitely many feasibl…
Interlacing families and the Hermitian spectral norm of digraphs
Gary Greaves, Bojan Mohar, O Suil
It is proved that for any finite connected graph , there exists an orientation of such that the spectral radius of the corresponding Hermitian adjacency matrix is smaller or…
Symmetric and skew-symmetric -matrices with large determinants
Gary Greaves, Sho Suda
We show that the existence of -matrices having largest possible determinant is equivalent to the existence of certain tournament matrices. In particular, we prove a rece…