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 2018Show all

6 papers · 1 filter

math.CO2018

The generalized distance matrix of digraphs

Weige Xi, Wasin So, Ligong Wang

Let $D (G)$ and $D^{Q} (G) = D ia g (T r) + D (G)$ be the distance matrix and distance signless Laplacian matrix of a simple strongly connected digraph $G$ , respectively, where $Diag(Tr)=\te…

math.CO2018★ 1 cited

Gallai-Ramsey numbers for a class of graphs with five vertices

Xihe Li, Ligong Wang

Given two graphs $G$ and $H$ , the $k$ -colored Gallai-Ramsey number $g r_{k} (G : H)$ is defined to be the minimum integer $n$ such that every $k$ -coloring of the complete graph on $n$ …

math.CO2018★ 1 cited

Forbidden rainbow subgraphs that force large monochromatic or multicolored k-connected subgraphs

Xihe Li, Ligong Wang

Let $n, k, m$ be positive integers with $n ≫ m ≫ k$ , and let $A$ be the set of graphs $G$ of order at least 3 such that there is a $k$ -connected monochromatic subgraph…

math.CO2018★ 3 cited

Merging the A- and Q-spectral theories for digraphs

Weige Xi, Wasin So, Ligong Wang

Let $G$ be a digraph and $A (G)$ be the adjacency matrix of $G$ . Let $D (G)$ be the diagonal matrix with outdegrees of vertices of $G$ . For any real $α \in [0, 1]$ , Liu et al. \cite{LWC…

math.CO2018★ 2 cited

The largest signless Laplacian spectral radius of uniform supertrees with diameter and pendent edges (vertices)

Cunxiang Duan, Ligong Wang, Peng Xiao

Let $S_{1} (m, d, k)$ be the $k$ -uniform supertree obtained from a loose path $P : v_{1}, e_{1}, v_{2}, \dots, v_{d}, e_{d}, v_{d + 1}$ with length $d$ by attaching $m - d$ edges at verte…

math.CO2018

The unicyclic graphs with the second smallest normalized Laplacian eigenvalue no less than $1 - \frac{6}{3}$

Weige Xi, Ligong Wang, Xiangxiang Liu +2

Let $λ_{2} (G)$ be the second smallest normalized Laplacian eigenvalue of a graph $G$ . In this paper, we determine all unicyclic graphs of order $n \geq 21$ with $λ_{2}(G)\geq 1-\frac…