| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4603635 | Linear Algebra and its Applications | 2007 | 7 Pages |
Abstract
Let G be a graph on n vertices, and let λ1,λ2,…,λn be its eigenvalues. The Estrada index of G is a recently introduced graph invariant, defined as . We establish lower and upper bounds for EE in terms of the number of vertices and number of edges. Also some inequalities between EE and the energy of G are obtained.
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
