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math.SP2019
Spectral gap of the largest eigenvalue of the normalized graph Laplacian
Jürgen Jost, Raffaella Mulas, Florentin Münch
We offer a new method for proving that the maximal eigenvalue of the normalized graph Laplacian of a graph with vertices is at least provided the graph is not…
math.SP2017
Magnetic sparseness and Schrödinger operators on graphs
Michel Bonnefont, Sylvain Golénia, Matthias Keller +2
We study magnetic Schrödinger operators on graphs. We extend the notion of sparseness of graphs by including a magnetic quantity called the frustration index. This notion of magnet…