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The inverse sum indeg index of a graph [Formula: see text] is defined as [Formula: see text], where [Formula: see text] is the degree of the vertex [Formula: see text].… Click to show full abstract
The inverse sum indeg index of a graph [Formula: see text] is defined as [Formula: see text], where [Formula: see text] is the degree of the vertex [Formula: see text]. In a recent paper, Pattabiraman [Inverse sum indeg index of graphs, AKCE Int. J. Graphs Combinat. 15(2) (2018) 155–167] gave some lower and upper bounds on [Formula: see text] index of all connected graphs in terms of Harmonic index, second Zagreb index and hyper Zagreb index. But some results were erroneous. In this note, we have corrected these results.
Keywords:
sum indeg;
index;
inverse sum;
see text;
formula see;
indeg index
Journal Title: Asian-European Journal of Mathematics
Year Published: 2019
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Journal Title: Asian-European Journal of Mathematics
Year Published: 2019
Link to full text (if available)
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recommendations!