Results 1 to 10 of about 13,750 (119)

Efficient algorithm on exponential Wiener index and QSPR analysis of alkanes and benzenoid hydrocarbons [PDF]

open access: yesScientific Reports
Any graph that depicts a particular molecular structure can be given a topological graph index, also known as a molecular descriptor. From this index, it is possible to examine numerical data and learn more about some of the physical characteristics of a
S. Punitha, K. Kannan, A. Menaga
doaj   +2 more sources

Wiener index in graphs with given minimum degree and maximum degree [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2021
Let $G$ be a connected graph of order $n$.The Wiener index $W(G)$ of $G$ is the sum of the distances between all unordered pairs of vertices of $G$. In this paper we show that the well-known upper bound $\big( \frac{n}{\delta+1}+2\big) {n \choose 2}$ on ...
Peter Dankelmann, Alex Alochukwu
doaj   +1 more source

Five results on maximizing topological indices in graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2021
In this paper, we prove a collection of results on graphical indices. We determine the extremal graphs attaining the maximal generalized Wiener index (e.g. the hyper-Wiener index) among all graphs with given matching number or independence number.
Stijn Cambie
doaj   +1 more source

The inverse Wiener polarity index problem for chemical trees. [PDF]

open access: yesPLoS ONE, 2018
The Wiener polarity number (which, nowadays, known as the Wiener polarity index and usually denoted by Wp) was devised by the chemist Harold Wiener, for predicting the boiling points of alkanes.
Zhibin Du, Akbar Ali
doaj   +1 more source

Comparison of the Wiener and Kirchhoff Indices of Random Pentachains

open access: yesJournal of Mathematics, 2021
Let G be a connected (molecule) graph. The Wiener index WG and Kirchhoff index KfG of G are defined as the sum of distances and the resistance distances between all unordered pairs of vertices in G, respectively.
Shouliu Wei   +3 more
doaj   +1 more source

Wiener index in graphs given girth, minimum, and maximum degrees

open access: yesTheory and Applications of Graphs, 2023
Let $G$ be a connected graph of order $n$. The Wiener index $W(G)$ of $G$ is the sum of the distances between all unordered pairs of vertices of $G$.
Fadekemi J. Osaye   +3 more
doaj   +1 more source

The quotients between the (revised) Szeged index and Wiener index of graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2017
Let $Sz(G),Sz^*(G)$ and $W(G)$ be the Szeged index, revised Szeged index and Wiener index of a graph $G.$ In this paper, the graphs with the fourth, fifth, sixth and seventh largest Wiener indices among all unicyclic graphs of order $n\geqslant 10$ are ...
Huihui Zhang, Jing Chen, Shuchao Li
doaj   +1 more source

Eccentricity based topological indices of face centered cubic lattice FCC(n)

open access: yesMain Group Metal Chemistry, 2021
Chemical graph theory has become a prime gadget for mathematical chemistry due to its wide range of graph theoretical applications for solving molecular problems.
Shaker Hani   +2 more
doaj   +1 more source

Sharp bounds and normalization of Wiener-type indices. [PDF]

open access: yesPLoS ONE, 2013
Complex networks abound in physical, biological and social sciences. Quantifying a network's topological structure facilitates network exploration and analysis, and network comparison, clustering and classification.
Dechao Tian, Kwok Pui Choi
doaj   +1 more source

The wiener index of the zero-divisor graph for a new class of residue class rings

open access: yesFrontiers in Chemistry, 2022
The zero-divisor graph of a commutative ring R, denoted by Γ(R), is a graph whose two distinct vertices x and y are joined by an edge if and only if xy = 0 or yx = 0.
Yinhu Wei, Ricai Luo
doaj   +1 more source

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