2 papers
math.CO2026
On Neumaier Cayley graphs
Rhys J. Evans, Sergey Goryainov, Grigory Ryabov +1
In the present paper, we study Neumaier Cayley graphs. First, we give a criterion for a Cayley graph to be a Neumaier graph with a spread given by the cosets of a subgroup. Further…
math.CO2025
Generalized block diagonal Laplacian spectrum of graphs
Yanrui Xu, Da Zhao
We reduce the block all-one matrices in the generalized block Laplacian spectrum of graphs to block all-one matrices in the generalized block diagonal Lapalcian spectrum…