Xiaocong He

activity

20202023

most citedExtremal graphs for the odd prism

6 citations · 14 across the 7 of their papers we have counts for

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Showing 2020Show all

3 papers · 1 filter

math.CO2020★ 2 cited

The normalized Laplacian, degree-Kirchhoff index and spanning trees of graphs derived from the strong prism of linear polyomino chain

Xiaocong He

Let $B_{n}$ be a linear polyomino chain with $n$ squares. Let $B_{n}^{2}$ be the graph obtained by the strong prism of a linear polyomino chain with $n$ squares, i.e. the strong product…

math.CO2020★ 3 cited

On the largest and least eigenvalues of eccentricity matrix of trees

Xiaocong He

The eccentricity matrix $ε (G)$ of a graph $G$ is constructed from the distance matrix of $G$ by keeping only the largest distances for each row and each column. This matr…

math.CO2020

On the maximum Zagreb indices of bipartite graphs with given connectivity

Xiaocong He, Xiaobo He

The first Zagreb index $M_{1}$ of a graph is defined as the sum of the square of every vertex degree, and the second Zagreb index $M_{2}$ of a graph is defined as the sum of the pr…