Ligong Wang

activity

20152023

most citedOrdering of bicyclic graphs by matching energy

7 citations · 33 across the 43 of their papers we have counts for

collaborators

Showing 2021Show all

5 papers · 1 filter

math.CO2021★ 5 cited

On a conjecture of Nikiforov involving a spectral radius condition for a graph to contain all trees

Xiangxiang Liu, Hajo Broersma, Ligong Wang

We partly confirm a Brualdi-Solheid-Turán type conjecture due to Nikiforov, which is a spectral radius analogue of the well-known Erdős-Sós Conjecture that any tree of order $t$ is…

math.CO2021

Growth rates of the bipartite Erdős-Gyárfás function

Xihe Li, Hajo Broersma, Ligong Wang

Given two graphs $G, H$ and a positive integer $q$ , an $(H, q)$ -coloring of $G$ is an edge-coloring of $G$ such that every copy of $H$ in $G$ receives at least $q$ distinct colors.…

math.CO2021★ 4 cited

Spectral radius conditions for the existence of all subtrees of diameter at most four

Xiangxiang Liu, Hajo Broersma, Ligong Wang

Let $μ (G)$ denote the spectral radius of a graph $G$ . We partly confirm a conjecture due to Nikiforov, which is a spectral radius analogue of the well-known Erdős-Sós Conjecture th…

math.CO2021

On the $A_{α}$ spectral radius and $A_{α}$ energy of non-strongly connected digraphs

Xiuwen Yang, Ligong Wang

Let $A_{α} (G)$ be the $A_{α}$ -matrix of a digraph $G$ and $λ_{α 1}, λ_{α 2}, \dots, λ_{α n}$ be the eigenvalues of $A_{α} (G)$ . Let $ρ_{α} (G)$ be the $A_{α}$ spectral radius of $G$ and $E_α(G)=…

math.CO2021

On the $A_{α}$ spectral radius of strongly connected digraphs

Weige Xi, Ligong Wang

Let $G$ be a digraph with adjacency matrix $A (G)$ . Let $D (G)$ be the diagonal matrix with outdegrees of vertices of $G$ . Nikiforov \cite{Niki} proposed to study the convex combinat…

On a conjecture of Nikiforov involving a spectral radius condition for a graph to contain all trees

Growth rates of the bipartite Erdős-Gyárfás function

Spectral radius conditions for the existence of all subtrees of diameter at most four

On the Aα​ spectral radius and Aα​ energy of non-strongly connected digraphs

On the Aα​ spectral radius of strongly connected digraphs

On the $A_{α}$ spectral radius and $A_{α}$ energy of non-strongly connected digraphs

On the $A_{α}$ spectral radius of strongly connected digraphs