Qiongxiang Huang

activity

20202023

most citedOn the spectral radius of minimally 2-(edge)-connected graphs with given size

3 citations · 4 across the 5 of their papers we have counts for

collaborators

6 papers

math.CO2023★ 1 cited

Disproof of a conjecture on the minimum spectral radius and the domination number

Yarong Hu, Zhenzhen Lou, Qiongxiang Huang

Let $G_{n, γ}$ be the set of all connected graphs on $n$ vertices with domination number $γ$ . A graph is called a minimizer graph if it attains the minimum spectral radius among $G_…

math.CO2022

Ordering $Q$ -indices of graphs: given size and girth

Yarong Hu, Zhenzhen Lou, Qiongxiang Huang

The signless Laplacian matrix in graph spectra theory is a remarkable matrix of graphs, and it is extensively studied by researchers. In 1981, Cvetković pointed $12$ directions in…

math.CO2022

Graphs with the minimum spectral radius for given independence number

Yarong Hu, Qiongxiang Huang, Zhenzhen Lou

Let $G_{n, α}$ be the set of connected graphs with order $n$ and independence number $α$ . Given $k = n - α$ , the graph with minimum spectral radius among $G_{n, α}$ is…

math.CO2022★ 3 cited

On the spectral radius of minimally 2-(edge)-connected graphs with given size

Zhenzhen Lou, Min Gao, Qiongxiang Huang

A graph is minimally $k$ -connected ( $k$ -edge-connected) if it is $k$ -connected ( $k$ -edge-connected) and deleting arbitrary chosen edge always leaves a graph which is not $k$ -connec…

math.CO2021

Quadratic starlike trees

Yarong Hu, Qiongxiang Huang

In this paper, we introduce the notion of the quadratic graph, that is a graph whose eigenvalues are integral or quadratic algebraic integral, and determine nine infinite families…

math.CO2020

Quadratic Embedding Constants of Graph Joins

Zhenzhen Lou, Nobuaki Obata, Qiongxiang Huang

The quadratic embedding constant (QE constant) of a graph is a new characteristic value of a graph defined through the distance matrix. We derive formulae for the QE constants of t…