The Harmonic and Second Zagreb Indices in Random Polyphenyl and Spiro Chains
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DOI: 10.1080/10406638.2020.1749089
Abstract: Abstract The polyphenyl chains with n hexagons are the special graphs of unbranched polycyclic aromatic hydrocarbons. The main objective of this study is to find the expected values of the harmonic and second Zagreb indices… read more here.
Keywords: zagreb indices; spiro chains; polyphenyl spiro; second zagreb ... See more keywords