Yuzhenni Wang

activity

20222026

most citedOn weighted spectral radius of unraveled balls and normalized Laplacian eigenvalues

1 citations · 1 across the 2 of their papers we have counts for

collaborators

3 papers

math.CO2026

The Sharp Upper Bounds for the Median Eigenvalues of Graphs

Zhengbo Chen, Yuzhenni Wang, Xiao-Dong Zhang

Let $λ_{1} \geq λ_{2} \geq \dots \geq λ_{n}$ be the eigenvalues of a simple graph $G$ of order $n$ . The HL-index of $G$ is defined by $R (G) = max ∥ λ_{h} ∣, ∣ λ_{ℓ} ∣}$ with $h=\lfloor(n+1)/2\rfloo…

math.CO2023

A note on median eigenvalues of subcubic graphs

Yuzhenni Wang, Xiao-Dong Zhang

Let $G$ be an simple graph of order $n$ whose adjacency eigenvalues are $λ_{1} \geq \dots \geq λ_{n}$ . The HL--index of $G$ is defined to be $R (G) = max {∣ λ_{h} ∣, ∣ λ_{l} ∣}$ with $h=\left\lf…

math.CO2022★ 1 cited

On weighted spectral radius of unraveled balls and normalized Laplacian eigenvalues

Yuzhenni Wang, Xiao-Dong Zhang

For a graph $G$ , the unraveled ball of radius $r$ centered at a vertex $v$ is the ball of radius $r$ centered at $v$ in the universal cover of $G$ . We obtain a lower bound on the w…