نتایج جستجو برای: atombond connectivity index

تعداد نتایج: 459849  

Journal: :Discrete Applied Mathematics 2010

Journal: :Malaya Journal of Matematik 2019

Journal: :Applied Mathematics and Nonlinear Sciences 2017

2017
M. R. Rajesh Kanna

In this paper, we compute ABC index, Randic connectivity index, Sum connectivity index, GA index, Harmonic index, General Randic index of Triglyceride. AMS subject classification:

2013
Wei Gao John H. Gilmore Sarael Alcauter Weili Lin

The default-mode network has been reported to possess highly versatile and even contrasting functions but the underlying functioning mechanism remains elusive. In this study, we adopt a dynamic view of the default-mode network structure and hypothesize that it could potentially contribute to different functions through dynamic reorganization of its functional interaction pattern within and acro...

Journal: :Australasian J. Combinatorics 1994
Roger C. Entringer Amram Meir John W. Moon László A. Székely

The Wiener index W( G) of a connected graph G is the sum of the distances d( u, v) between all pairs of vertices u and v of G. This index seems to have been introduced in [22] where it was shown that certain physical properties of various paraffin species are correlated with the Wiener index of the tree determined by the carbon atoms of the corresponding molecules. Canfield, Robinson, and Rouvr...

Journal: :Discrete Mathematics 2009
Peter Dankelmann Ivan Gutman Simon Mukwembi Henda C. Swart

If G is a connected graph, then the distance between two edges is, by definition, the distance between the corresponding vertices of the line graph of G. The edge-Wiener index We of G is then equal to the sum of distances between all pairs of edges of G. We give bounds on We in terms of order and size. In particular we prove the asymptotically sharp upper bound We(G) ≤ 25 55 n5 + O(n9/2) for gr...

2010
Liancui Zuo

For an edge uv of a graph G, the weight of the edge e = uv is denoted by w(e) = 1/ √ d(u)d(v). Then

2006
Mei LU Lianzhu ZHANG Feng TIAN

The Randić index of an organic molecule whose molecular graph is G is the sum of the weights (d(u)d(v))− 1 2 of all edges uv of G, where d(u) and d(v) are the degrees of the vertices u and v in G. In the paper, we give a sharp lower bound on the Randić index of cacti.

Journal: :Discrete Applied Mathematics 2006
Huiqing Liu Mei Lu Feng Tian

The connectivity index wα(G) of a graph G is the sum of the weights (d(u)d(v)) of all edges uv of G, where α is a real number (α 6= 0), and d(u) denotes the degree of the vertex u. Let T be a tree with n vertices and k pendant vertices. In this paper, we give sharp lower and upper bounds for w1(T ). Also, for −1 ≤ α < 0, we give a sharp lower bound and a upper bound for wα(T ).

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