Contra Harmonic Index Of Graphs

International Journal of Mathematics Trends and Technology (IJMTT)
© 2020 by IJMTT Journal
Volume-66 Issue-12
Year of Publication : 2020
Authors : S.Ragavi, R.Sridevi


MLA Style: S.Ragavi, R.Sridevi "Contra Harmonic Index Of Graphs" International Journal of Mathematics Trends and Technology 66.12 (2020):116-121. 

APA Style: S.Ragavi, R.Sridevi(2020). Contra Harmonic Index Of Graphs.  International Journal of Mathematics Trends and Technology, 116-121.

Let G be amolecular graph with vertex set V(G) and edge set E(G). We introduce a new topological index namely Contra Harmonic index which is defined as CH(G) = ΣuvεE(G)d(u)2+d(v)2 / d(u)+d(v) where d(u) and d(v) are the degree of the vertices u and v.In this paper, we obtained bounds for contra harmonic index of graphs.


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Keywords : Contra Harmonic index, Contra Harmonic Co-index