9 citations · 16 across the 23 of their papers we have counts for
4 papers · 1 filter
On the spectral characterization of mixed extensions of
Willem H. Haemers, Sezer Sorgun, Hatice Topcu
A mixed extension of a graph is a graph obtained from by replacing each vertex of by a clique or a coclique, whilst two vertices in corresponding to distinct ve…
The chromatic index of strongly regular graphs
Sebastian M. Cioaba, Krystal Guo, Willem H. Haemers
We determine (partly by computer search) the chromatic index (edge-chromatic number) of many strongly regular graphs (SRGs), including the SRGs of degree and their comp…
Deza graphs with parameters and
Sergey Goryainov, Willem H. Haemers, Vladislav V. Kabanov +1
A Deza graph with parameters is a -regular graph with vertices in which any two vertices have or () common neighbours. A Deza graph is strictly…
Graph switching, 2-ranks, and graphical Hadamard matrices
Aida Abiad, Steve Butler, Willem H. Haemers
We study the behaviour of the 2-rank of the adjacency matrix of a graph under Seidel and Godsil-McKay switching, and apply the result to graphs coming from graphical Hadamard matri…