Extremal Graphs for a Spectral Inequality on Edge-Disjoint Spanning Trees

Sebastian M. Cioabă, Anthony Ostuni, Davin Park +3

Liu, Hong, Gu, and Lai proved if the second largest eigenvalue of the adjacency matrix of graph $G$ with minimum degree $\delta \ge 2m+2\ge 4$ satisfies ${\lambda }_2(G)<\delta -\frac{2m+1}{\delta +1}$,…