Integral signed subcubic graphs

Laplacian integral subcubic signed graphs

“…Recently, Hou et al [9] and Stanić [16] found out all integral signed graphs with vertex degree at most 4 and exactly 2 eigenvalues. Wang and Hou [14] gave all connected integral subcubic signed graphs. Stanić [15] investigated integral regular net-balanced signed graphs with vertex degree at most 4.…”

“…If G is 3-regular then Γ = (G, σ) is Laplacian integral if and only if it is integral, which are identified in [12] and [14].…”