9 citations · 25 across the 9 of their papers we have counts for
18 papers · 1 filter
A lower bound for the smallest eigenvalue of a graph and an application to the associahedron graph
Sebastian M. Cioabă, Vishal Gupta
In this paper, we obtain a lower bound for the smallest eigenvalue of a regular graph containing many copies of a smaller fixed subgraph. This generalizes a result of Aharoni, Alon…
The spectral even cycle problem
Sebastian Cioabă, Dheer Noal Desai, Michael Tait
In this paper, we study the maximum adjacency spectral radii of graphs of large order that do not contain an even cycle of given length. For , let be the join of a c…
The spectral radius of graphs with no odd wheels
Sebastian Cioabă, Dheer Noal Desai, Michael Tait
The odd wheel is the graph formed by joining a vertex to a cycle of length . In this paper, we investigate the largest value of the spectral radius of the adjacency…
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 with minimum degree satisfies ,…
On the eigenvalues of Grassmann graphs, Bilinear forms graphs and Hermitian forms graphs
Sebastian M. Cioabă, Himanshu Gupta
Recently, Brouwer, Cioabă, Ihringer and McGinnis obtained some new results involving the eigenvalues of various graphs coming from association schemes and posed some conjectures re…
On a question of Haemers regarding vectors in the nullspace of Seidel matrices
Saieed Akbari, Sebastian M. Cioabă, Samira Goudarzi +2
In 2011, Haemers asked the following question: If is the Seidel matrix of a graph of order and is singular, does there exist an eigenvector of corresponding to …