Zhenyu Ni

activity

20152026

collaborators

Showing 2022Show all

4 papers · 1 filter

math.CO2022

Spectral extremal graphs for disjoint cliques

Zhenyu Ni, Jing Wang, Liying Kang

The $k K_{r + 1}$ is the union of $k$ disjoint copies of $(r + 1)$ -clique. Moon [Canad. J. Math. 20 (1968) 95--102] and Simonovits [Theory of Graphs (Proc. colloq., Tihany, 1996)] indep…

math.CO2022

Spectral Turán Type Problems on Cancellative Hypergraphs

Zhenyu Ni, Lele Liu, Liying Kang

Let $G$ be a cancellative $3$ -uniform hypergraph in which the symmetric difference of any two edges is not contained in a third one. Equivalently, a $3$ -uniform hypergraph $G$ is c…

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…