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math.SP2026
A Sharp Forbidden Interval for the Nontrivial Adjacency Eigenvalues of Trivially Perfect Graphs
Cristian M. Conde, Ezequiel Dratman, Luciano N. Grippo
We prove a sharp forbidden interval for the nontrivial adjacency eigenvalues of trivially perfect graphs. More precisely, we show that if is a trivially perfect graph, then $\o…
math.SP2020
On the spectral radius of block graphs having all their blocks of the same size
Cristian M. Conde, Ezequiel Dratman, Luciano N. Grippo
Let be the class of block graphs on vertices having all their blocks of the same size. We prove that if has at most three pairwise ad…