Yuli Zhang

collaborators

2 papers

math.CO2026

Toughness and AÎ±-spectral radius in graphs

Sizhong Zhou, Yuli Zhang, Tao Zhang +1

Let $I^\pm \in [0, 1)$ , and let $G$ be a connected graph of order $n$ with $n \geq f (I^\pm)$ , where $f (I^\pm) = 6$ for $I^\pm \in [0, \frac{2}{3}]$ and $f (I^\pm) = \frac{4}{1 - I ^ \pm}$ for $I^\pm \in (\frac{2}{3}, 1)$ …

math.CO2025

An AÎ±-spectral radius for the existence of {P3, P4, P5}-factors in graphs

Yuli Zhang, Sizhong Zhou

Let $G$ be a connected graph of order $n$ with $n \geq 25$ . A ${P_{3}, P_{4}, P_{5}}$ -factor is a spanning subgraph $H$ of $G$ such that every component of $H$ is isomorphic to an element…