Results 11 to 20 of about 16,885,510 (241)

On the Wiener Complexity and the Wiener Index of Fullerene Graphs

open access: yesMathematics, 2019
Fullerenes are molecules that can be presented in the form of cage-like polyhedra, consisting only of carbon atoms. Fullerene graphs are mathematical models of fullerene molecules.
Andrey A. Dobrynin, Andrei Yu Vesnin
doaj   +2 more sources

The Hyper-Wiener Index of Trees of Order n with Diameter d [PDF]

open access: yesDiscrete Dynamics in Nature and Society, 2016
The hyper-Wiener index is a kind of extension of the Wiener index, used for predicting physicochemical properties of organic compounds. The hyper-Wiener index WW(G) is defined as WW(G)=1/2∑u,v∈VGdGu,v+dG2u,v with the summation going over all pairs of ...
Gaixiang Cai   +4 more
doaj   +2 more sources

A brief historical perspective of the Wiener-Hopf technique [PDF]

open access: yes, 2007
It is a little over 75 years since two of the most important mathematicians of the 20th century collaborated on finding the exact solution of a particular equation with semi-infinite convolution type integral operator.
Lawrie, JB, Abrahams, ID
core   +7 more sources

GTI-space : the space of generalized topological indices [PDF]

open access: yes, 2008
A new extension of the generalized topological indices (GTI) approach is carried out torepresent 'simple' and 'composite' topological indices (TIs) in an unified way.
Matamala, Adelio R.   +2 more
core   +4 more sources

Wiener index of graphs with fixed number of pendant or cut-vertices [PDF]

open access: yes, 2022
summary:The Wiener index of a connected graph is defined as the sum of the distances between all unordered pairs of its vertices. We characterize the graphs which extremize the Wiener index among all graphs on $n$ vertices with $k$ pendant vertices.
Pandey, Dinesh, Patra, Kamal Lochan
core   +3 more sources

Unicyclic Graphs with the Fourth Extremal Wiener Indices

open access: yesJournal of Chemistry, 2020
A graph is called unicyclic if the graph contains exactly one cycle. Unicyclic graphs with the fourth extremal Wiener indices are characterized. It is shown that, among all unicyclic graphs with n≥8 vertices, C5Sn−4 and C2u1,u2S3,Sn−4 attain the fourth ...
Guangfu Wang   +3 more
doaj   +1 more source

Gutman index‎, ‎edge-Wiener index and edge-connectivity [PDF]

open access: yesTransactions on Combinatorics, 2020
‎We study the Gutman index ${\rm Gut}(G)$ and the edge-Wiener index $W_e (G)$ of connected graphs $G$ of given order $n$ and edge-connectivity $\lambda$‎.
Jaya Mazorodze   +2 more
doaj   +1 more source

Effects of ENSO events on the intensity, seasonality, and diversity of reproductive phenology of Miconia (Melastomataceae) species in tropical rainforest [PDF]

open access: yesBrazilian Journal of Biology, 2023
We evaluated the phenology and reproductive phenological diversity of three sympatric species of Miconia in a gallery forest in the Chapada Diamantina mountains, Bahia, Brazil.
A. G. Barros   +6 more
doaj   +1 more source

The Wiener-Hopf-Hilbert technique applied to problems in diffraction [PDF]

open access: yes, 1999
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.A number of diffraction problems which have practical applications are examined using the Wiener-Hopf-Hilbert technique.
Barton, Peter
core   +7 more sources

Hosoya and Harary Polynomials of TOX(n),RTOX(n),TSL(n) and RTSL(n)

open access: yesDiscrete Dynamics in Nature and Society, 2019
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.
Lian Chen   +5 more
doaj   +1 more source

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