Department of Mathematics and Computer Science, Sirjan University of Technology, Sirjan, Iran
Hamideh Aram, Maryam Atapour, Nasrin Dehgardi
In this paper: In a graph G, the neighborhood version of the harmonic index is calculated by summing the values 2/(ΛG (x)+ΛG (y)) for all pairs of adjacent vertices x and y. Here, ΛG (x) represents the total degree...
Nasrin Dehgardi, Mahdieh Azari, Yilun Shang
In this paper: The inverse sum indeg (ISI) index of a simple graph 𝒦 is expressed by ISI(𝒦) = ∑ς𝒦 ς’𝒦∈E𝒦 d𝒦 (ς𝒦)d𝒦 (ς’𝒦)/d𝒦 (ς𝒦) + d𝒦 (ς’𝒦). in which E𝒦 represents the edge set of the graph 𝒦 and d𝒦 (ς𝒦) indicat...
Nasrin Dehgardi
In this paper: Recently, Mondal et al. introduced several new indices based on neighborhood degree sum of vertices, which received increasing research attention. In this paper, we consider a variant of these indices...
Mahdieh Azari, Nasrin Dehgardi
In this paper: The product-connectivity (also called Randić connectivity) index, sum-connectivity index and harmonic index are among the best-known and most successful vertex-degree-based topological indices in math...
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