Publications de l'Institut Mathématique, Nouvelle Série Vol. 83(97), pp. 1–7 (2008) 

LOWER BOUNDS FOR ESTRADA INDEXIvan GutmanFaculty of Science, University of Kragujevac, SerbiaAbstract: If $G$ is an $(n,m)$graph whose spectrum consists of the numbers $\lambda_1,\lambda_2,\ldots,\lambda_n$, then its Estrada index is $\operatname{EE}(G)=\sum_{i=1}^n e^{\lambda_i}$. We establish lower bounds for $\operatorname{EE}(G)$ in terms of $n$ and $m$. Classification (MSC2000): 05C50; 05C35 Full text of the article: (for faster download, first choose a mirror)
Electronic fulltext finalized on: 21 Oct 2008. This page was last modified: 10 Dec 2008.
© 2008 Mathematical Institute of the Serbian Academy of Science and Arts
