3 papers
math.CO2023
Extremal problems for disjoint graphs
Zhenyu Ni, Jing Wang, Liying Kang
For a simple graph , let and be the set of graphs with the maximum number of edges and the set of graphs with the maximum spectral ra…
math.CO2023
Fractional revival on semi-Cayley graphs over abelian groups
Jing Wang, Ligong Wang, Xiaogang Liu
In this paper, we investigate the existence of fractional revival on semi-Cayley graphs over finite abelian groups. We give some necessary and sufficient conditions for semi-Cayley…
math.CO2022
Spectral extremal graphs for disjoint cliques
Zhenyu Ni, Jing Wang, Liying Kang
The is the union of disjoint copies of -clique. Moon [Canad. J. Math. 20 (1968) 95--102] and Simonovits [Theory of Graphs (Proc. colloq., Tihany, 1996)] indep…