In this paper,the distribution law of the Laplacian eigenvalues from the first to the sixth of the unbalanced signed bicyclic graphs is studied,some inaccuracies of the existing conclusions are corrected,the existing results are generalized,and the legend of the extreme value is given.
关键词
非平衡符号图/双圈图/谱半径/拉普拉斯矩阵/特征多项式
Key words
unbalanced signed bicyclic graphs/bicyclic graph/spectral radius/Laplacian matrix/characteristic polynomial