5 citations · 13 across the 29 of their papers we have counts for
9 papers · 1 filter
Spectral characterizations of local structures of graphs and hypergraphs
Jiang Zhou, Changjiang Bu
In this paper, we give the relationship between spectral radius and local structures of graphs and hypergraphs. Our work shows that certain local subgraphs (subhypergraphs) must oc…
The high order spectral radius of graphs without long cycles or paths
Yuntian Wang, Lizhu Sun, Changjiang Bu
In 1959, Erdős and Gallai established two classic theorems, which determine the maximum number of edges in an -vertex graph with no cycles of length at least , and in an -…
Perron-Frobenius theorem for dual tensors and its applications
Changjiang Bu, Yue Chu, Qingying Zhang +1
The Perron-Frobenius theorem of nonnegative matrices is a classical result on spectral theory of matrices, which has wide applications in many domains. In this paper, we give the P…
The ordering of hypertrees and unicyclic hypergraphs by the traces of -tensor
Jueru Liu, Lizhu Sun, Changjiang Bu
For a real number and a -uniform hypergraph , is called the $\mathc…
Lexicographical ordering by spectral moments of bicyclic hypergraphs
Hong Zhou, Changjiang Bu
For bicyclic hypergraphs, ordering by spectral moment (-order) is investigated in this paper. We give the first and last hypergraphs in an -order of linear bicyclic uniform h…
Extremal Zagreb indices of bicyclic hypergraphs
Hong Zhou, Changjiang Bu
The Zagreb index of a hypergraph is defined as the sum of the squares of the degrees of its vertices. A connected -uniform hypergraph with vertices and edges is called b…