3 papers
math.CO2019
Integral graphs obtained by dual Seidel switching
Sergey Goryainov, Elena V. Konstantinova, Honghai Li +1
Dual Seidel switching is a graph operation introduced by W.~Haemers in 1984. This operation can change the graph, however it does not change its bipartite double, and because of th…
math.CO2018
The largest spectral radius of uniform hypertrees with a given size of matching
Li Su, Liying Kang, Honghai Li +1
In this paper, using the theory of matching polynomial of hypertrees and ordering of hypertrees, we determine the largest spectral radius of hypertrees with edges and given siz…
math.CO2018
The matching polynomials and spectral radii of uniform supertrees
Li Su, Liying Kang, Honghai Li +1
We study matching polynomials of uniform hypergraph and spectral radii of uniform supertrees. By comparing the matching polynomials of supertrees, we extend Li and Feng's results o…