|
Z. Naturforsch. 67a, 403 – 406
(2012)
doi:10.5560/ZNA.2012-0027
Estimating the Laplacian Energy-Like Molecular Structure Descriptor
Faculty of Science, University of Kragujevac, P. O. Box 60, 34000 Kragujevac, Serbia
Received January 20, 2012 / published online July 3, 2012
Reprint requests to: I. G.; E-mail:
gutman@kg.ac.rs
Lower and upper bounds for the Laplacian energy-like (LEL) molecular structure descriptor are obtained, better than those previously known. These bonds are in terms of number of vertices and edges of the underlying molecular graph and of graph complexity (number of spanning trees).
Key words: Energy (of Graph); Laplacian Energy; Laplacian Energy-Like Invariant; LEL.