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2018, vol. 42, br. 1, str. 29-39
Steiner Harary index
(naslov ne postoji na srpskom)
Department of Mathematics, Qinghai Normal University, Xining, Qinghai, China

e-adresamaoyaping@ymail.com
Projekat:
Project by the National Science Foundation of China 11601254, 11551001, 11661068, 11161037, 11461054
Project by Science Found of Qinghai Province Nos. 2016-ZJ-948Q, 2014-ZJ-907, and 2014-ZJ-721

Ključne reči: distance; Steiner distance; Harary index; Steiner Harary k-index
Sažetak
(ne postoji na srpskom)
The P Harary index H(G) of a connected graphs G is defined as H(G) = Ʃu,ve2V (G) 1 dG(u,v) where dG(u, v) is the distance between vertices u and v of G. The Steiner distance in a graph, introduced by Chartrand et al. in 1989, is a natural generalization of the concept of classical graph distance. For a connected graph G of order at least 2 and S ⊆ V (G), the Steiner distance dG(S) of the vertices of S is the minimum size of all connected subgraphs whose vertex set contain S. Recently, Furtula, Gutman, and Katanić introduced the concept of Steiner Harary index and give its chemical applications. The k-center Steiner Harary index SHk(G) of G is defined by SHk(G) = Ʃ S⊆V (G), |S|=k 1 dG(S) . Expressions for SHk for some special graphs are obtained. We also give sharp upper and lower bounds of SHk of a connected graph, and establish some of its properties in the case of trees.
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O članku

jezik rada: engleski
vrsta rada: neklasifikovan
DOI: 10.5937/KgJMath1801029M
objavljen u SCIndeksu: 15.03.2018.

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