3 papers
math.CO2026
Two-place Laplacian matching root integral variations are impossible
Sebastian M. CioabÄ, Lele Liu, Yi Wang
Wang, Cui, and CioabÄ introduced the Laplacian matching root integral variation of a graph and proved that it cannot occur in one place. They also showed that the two-place variat…
math.CO2025
On the Spread of Graph-Related Matrices
Lele Liu, Yi-Zheng Fan, Yi Wang +1
The spread of a real symmetric matrix is defined as the difference between its largest and smallest eigenvalue. The study of graph-related matrices has attracted considerable atten…
math.CO2024
Maximum spread of -minor free graphs
Wenyan Wang, Lele Liu, Yi Wang
The spread of a graph is the difference between the largest and smallest eigenvalue of its adjacency matrix. In this paper, we investigate spread problems for graphs with excluded…