Thin divisible designs graphs: an interplay between fixed-point free involutions of $(v,k,\lambda )$-graphs and symmetric weighing matrices

Sergey Goryainov, Willem H. Haemers, Elena V. Konstantinova +1

In this paper, we illustrate important aspects of the interplay between weighing matrices, $(v,k,\lambda )$-graphs with fixed-point free involutions, and signed graphs with an orthogonal…