Spectra and eigenspaces of arbitrary lifts of graphs
C. Dalfó, M. A. Fiol, S. Pavlíková, J. Širáň·2019-03-26·via math.CO updates on arXiv.org
We describe, in a very explicit way, a method for determining the spectra and bases of all the corresponding eigenspaces of arbitrary lifts of graphs (regular or not).