Abstract
The concept of geometric–arithmetic index was introduced in the chemical graph theory recently, but it has shown to be useful. The aim of this paper is to obtain new inequalities involving the geometric–arithmetic index \(GA_1\) and characterize graphs extremal with respect to them.
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This is one of several papers published together in Journal of Mathematical Chemistry on the “Special Issue: CMMSE 2017”.
First author supported in part by a grant from Ministerio de Economía y Competitividad (MTM 2015-63612P), Spain. Second and third authors supported in part by two grants from Ministerio de Economía y Competitividad (MTM 2016-78227-C2-1-P and MTM 2015-69323-REDT), Spain, and a grant from CONACYT (FOMIX-CONACyT-UAGro 249818), México.
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Martínez-Pérez, A., Rodríguez, J.M. & Sigarreta, J.M. CMMSE: A new approximation to the geometric–arithmetic index. J Math Chem 56, 1865–1883 (2018). https://doi.org/10.1007/s10910-017-0811-3
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DOI: https://doi.org/10.1007/s10910-017-0811-3