Abstract
Let $G$ be an undirected simple, connected graph with $n \geq 3$ vertices and $m$ edges, with vertex degree sequence $d_1\ge d_2 \ge \cdots \ge d_n$. The general Randi\'c index is defined by \[ R_{-1}=\sum _{(i,j)\in E}\frac {1}{d_id_j}. \] Lower and upper bounds for $R_{-1}$ are obtained in this paper.
Citation
E.I. Milovanović. M.P. Bekakos. "Sharp bounds for the general Randić index $R_-1$ of a graph." Rocky Mountain J. Math. 47 (1) 259 - 266, 2017. https://doi.org/10.1216/RMJ-2017-47-1-259
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