Figure 4From: On the sum of the two largest Laplacian eigenvalues of unicyclic graphs Two unicyclic graphs of order n . \(T_{a,b,c}\) is a unicyclic graph of order n obtained by attaching a, b, c pendent vertices to three vertices of a triangle \(uvw\), respectively, and \(Q_{a,b}\) is a unicyclic graph of order n obtained by attaching a and b pendent vertices to two non-adjacent vertices of a quadrangle, respectively.Back to article page