Northwestern Polytechnical University

output

20062025

most citedStatistical physics of human cooperation

1.6k citations

Showing 2016 · math.COShow all

3 papers · 2 filters

math.CO2016★ 1 cited

Skew-rank of an oriented graph in terms of the rank and dimension of cycle space of its underlying graph

Yong Lu, Ligong Wang, Qiannan Zhou

Let $G^{σ}$ be an oriented graph and $S (G^{σ})$ be its skew-adjacency matrix, where $G$ is called the underlying graph of $G^{σ}$ . The skew-rank of $G^{σ}$ , denoted by $sr (G^{σ})$ , is the ra…

math.CO2016

Some upper bounds for the signless Laplacian spectral radius of digraphs

Weige Xi, Ligong Wang

Let $G = (V (G), E (G))$ be a digraph without loops and multiarcs, where $V (G) = {v_{1}, v_{2}, \dots, v_{n}}$ and $E (G)$ are the vertex set and the arc set of $G$ , respectively. Let $d_{i}^{+}$ …

math.CO2016

Distance signless Laplacian spectral radius and Hamiltonian properties of graphs

Qiannan Zhou, Ligong Wang

In this paper, first, we establish a sufficient condition for a bipartite graph to be Hamilton-connected. Furthermore, we also give two sufficient conditions on distance signless L…