Exact eigenvalue spectrum of a class of fractal scale-free networks
  The eigenvalue spectrum of the transition matrix of a network encodes important information about its structural and dynamical properties. We study the transition matrix of a family of fractal scale-free networks and analytically determine all the eigenvalues and their degeneracies. We then use these eigenvalues to evaluate the closed-form solution to the eigentime for random walks on the networks under consideration. Through the connection between the spectrum of transition matrix and the number of spanning trees, we corroborate the obtained eigenvalues and their multiplicities. 
Zhongzhi Zhang, Zhengyi Hu, Yibin Sheng, and Guanrong Chen
cond-mat.stat-mech physics.soc-ph