Results 21 to 30 of about 16,423 (156)

Wiener index of quadrangulation graphs

open access: yesDiscrete Applied Mathematics, 2021
The Wiener index of a graph $G$, denoted $W(G)$, is the sum of the distances between all pairs of vertices in $G$. É. Czabarka, et al. conjectured that for an $n$-vertex, $n\geq 4$, simple quadrangulation graph $G$, \begin{equation*}W(G)\leq \begin{cases} \frac{1}{12}n^3+\frac{7}{6}n-2, &\text{ $n\equiv 0~(mod \ 2)$,}\\ \frac{1}{12}n^3+\frac{11}{12}
Ervin Györi   +2 more
openaire   +2 more sources

Hosoya Polynomials Of Some Semiconducotors

open access: yesJournal of Kufa for Mathematics and Computer, 2014
The Hosoya polynomial of a graph G is a graphical invariant polynomial that its first derivative at x = 1 is equal to the Wiener index and second derivative at x =1 is equal to the hyperWiener index.
Azeez Lafta Jabir   +2 more
doaj   +1 more source

The Wiener index of signed graphs [PDF]

open access: yesApplied Mathematics and Computation, 2022
The Wiener index of a graph $W(G)$ is a well studied topological index for graphs. An outstanding problem of Šolt{é}s is to find graphs $G$ such that $W(G)=W(G-v)$ for all vertices $v\in V(G)$, with the only known example being $G=C_{11}$. We relax this problem by defining a notion of Wiener indices for signed graphs, which we denote by $W_σ(G)$, and ...
openaire   +3 more sources

Hosoya and Harary Polynomials of Hourglass and Rhombic Benzenoid Systems

open access: yesJournal of Chemistry, 2020
In the fields of chemical graph theory, topological index is a type of a molecular descriptor that is calculated based on the graph of a chemical compound.
Zhong-Lin Cheng   +4 more
doaj   +1 more source

On the parity of the Wiener index

open access: yesEuropean Journal of Combinatorics, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Stephan G. Wagner, Hua Wang 0003
openaire   +2 more sources

A Note on “Wiener Index of a Fuzzy Graph and Application to Illegal Immigration Networks”

open access: yesApplied Sciences, 2021
Connectivity parameters have an important role in the study of communication networks. Wiener index is such a parameter with several applications in networking, facility location, cryptology, chemistry, and molecular biology, etc.
Hoon Lee, Xue-gang Chen, Moo Young Sohn
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

Tail Bounds for the Wiener Index of Random Trees [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2007
Upper and lower bounds for the tail probabilities of the Wiener index of random binary search trees are given. For upper bounds the moment generating function of the vector of Wiener index and internal path length is estimated.
Tämur Ali Khan, Ralph Neininger
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

Wiener, edge-Wiener, and vertex-edge-Wiener index of Basilica graphs

open access: yesDiscrete Applied Mathematics, 2022
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Matteo Cavaleri   +3 more
openaire   +2 more sources

Home - About - Disclaimer - Privacy