On adjacency and Laplacian cospectral non-isomorphic signed graphs
On adjacency and Laplacian cospectral non-isomorphic signed graphs
Let Γ = (G,σ) be a signed graph, where σ is the sign function on the edges of G. In this paper, we use the operation of partial transpose to obtain non-isomorphic Laplacian cospectral signed graphs. We will introduce two new operations on signed graphs. These operations will establish a …