Zhenyu Ni

collaborators

3 papers

math.CO2022

The maximal spectral radius of the uniform unicyclic hypergraph with perfect matchings

Rui Sun, Wen-Huan Wang, Zhen-Yu Ni

Let $U (n, k)$ and $Γ (n, k)$ be the set of the $k$ -uniform linear and nonlinear unicyclic hypergraphs having perfect matchings with $n$ vertices respectively, where $n\geq k…

math.CO2022

Extremal graphs for edge blow-up of lollipops

Yanni Zhai, Xiying Yuan, Zhenyu Ni

Given a graph $H$ and an integer $p$ ( $p \geq 2$ ), the edge blow-up $H^{p + 1}$ of $H$ is the graph obtained from replacing each edge in $H$ by a clique of order $(p + 1)$ , where the ne…

math.CO2021

Spectral extremal graphs for intersecting cliques

Dheer Noal Desai, Liying Kang, Yongtao Li +3

The $(k, r)$ -fan is the graph consisting of $k$ copies of the complete graph $K_{r}$ which intersect in a single vertex, and is denoted by $F_{k, r}$ . Erdős, Füredi, Gould and Gunderso…