Long Wang

activity

20122020

most citedMaximum Estrada Index of Bicyclic Graphs

21 citations · 42 across the 5 of their papers we have counts for

collaborators

5 papers

math.AG2020

On automorphisms of Hilbert squares of smooth hypersurfaces

Long Wang

Let $X$ be a smooth projective hypersurface of dimension at least three. We show that every automorphism of the Hilbert square $X^{[2]}$ of $X$ is induced by some automorphism of $…

math.AG2020

Remarks on nef and movable cones of hypersurfaces in Mori dream spaces

Long Wang

We investigate nef and movable cones of hypersurfaces in Mori dream spaces. The first result is: Let $Z$ be a smooth Mori dream space of dimension at least four whose extremal cont…

math.CO2014★ 14 cited

Bounds for the positive or negative inertia index of a graph

Yi-Zheng Fan, Long Wang

Let $G$ be a graph and let $A (G)$ be adjacency matrix of $G$ .The positive inertia index (respectively, the negative inertia index) of $G$ , denoted by $p (G)$ (respectively, $n (G)$ ),…

math.CO2013★ 7 cited

The signature of line graphs and power trees

Long Wang, Yi-Zheng Fan

Let $G$ be a graph and let $A (G)$ be the adjacency matrix of $G$ . The signature $s (G)$ of $G$ is the difference between the positive inertia index and the negative inertia index of…

math.CO2012★ 21 cited

Maximum Estrada Index of Bicyclic Graphs

Long Wang, Yi-Zheng Fan, Yi Wang

Let $G$ be a simple graph of order $n$ , let $λ_{1} (G), λ_{2} (G), ..., λ_{n} (G)$ be the eigenvalues of the adjacency matrix of $G$ . The Esrada index of $G$ is defined as $EE(G)=\sum_{i=1}^{n…