Bounds on the Estrada index of ISR ( 4 , 6 ) -fullerenes

Suppose G is a graph and λ 1 , λ 2 , … λ n are the eigenvalues of G . The Estrada index E E ( G ) of G is defined as the sum of the terms e λ i , 1 ≤ i ≤ n . In this work some upper and lower bounds for the Estrada index of ( 4 , 6 ) -fullerene graphs are presented.

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Veröffentlicht in:	Applied mathematics letters 2011-03, Vol.24 (3), p.337-339
Hauptverfasser:	Ashrafi, A.R., Fath-Tabar, G.H.
Format:	Artikel
Sprache:	eng
Schlagworte:	[formula omitted]-fullerene Eigenvalue Eigenvalues Estrada index Exact sciences and technology Graphs Lower bounds Mathematical analysis Mathematics Nonlinear algebraic and transcendental equations Numerical analysis Numerical analysis. Scientific computation Numerical linear algebra Sciences and techniques of general use
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Beschreibung
Zusammenfassung:	Suppose G is a graph and λ 1 , λ 2 , … λ n are the eigenvalues of G . The Estrada index E E ( G ) of G is defined as the sum of the terms e λ i , 1 ≤ i ≤ n . In this work some upper and lower bounds for the Estrada index of ( 4 , 6 ) -fullerene graphs are presented.
ISSN:	0893-9659 1873-5452
DOI:	10.1016/j.aml.2010.10.018