Zhiren Sun

collaborators

2 papers

math.CO2026

Spectral radii and star-factors with large components

Zhiren Sun, Sizhong Zhou

Let $G$ be a connected graph with $n$ vertices. The isolated toughness of $G$ , denoted by $I (G)$ , is defined by $I(G)=\min\left\{\frac{|S|}{i(G-S)}:S\subseteq V(G) \ \mbox{and} \ i…

math.CO2024

Spectral radius and k-factor-critical graphs

Sizhong Zhou, Zhiren Sun, Yuli Zhang

For a nonnegative integer $k$ , a graph $G$ is said to be $k$ -factor-critical if $G - Q$ admits a perfect matching for any $Q \subseteq V (G)$ with $∣ Q ∣ = k$ . In this article, we prove sp…