Results 21 to 30 of about 131,666 (230)

Merging the Spectral Theories of Distance Estrada and Distance Signless Laplacian Estrada Indices of Graphs [PDF]

open access: yes, 2019
Suppose that G is a simple undirected connected graph. Denote by D(G) the distance matrix of G and by Tr(G) the diagonal matrix of the vertex transmissions in G, and let α∈[0,1] . The generalized distance matrix Dα(G) is defined as Dα(G)=αTr(G)+(1−α)D(G)
Alhevaz, Abdollah   +2 more
core   +1 more source

On Annihilating - Ideal Graph of Zn [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2018
In this paper, we study and give some properties of annihilating-ideal graphs of Zn, also we find Hosoya polynomial and Wiener index for this graph.
Husam Mohammad, Sahbaa Younus
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

Generalized Hermite processes, discrete chaos and limit theorems [PDF]

open access: yes, 2014
We introduce a broad class of self-similar processes $\{Z(t),t\ge 0\}$ called generalized Hermite process. They have stationary increments, are defined on a Wiener chaos with Hurst index $H\in (1/2,1)$, and include Hermite processes as a special case ...
Bai, Shuyang, Taqqu, Murad S.
core   +2 more sources

The Wiener polarity index of benzenoid systems and nanotubes [PDF]

open access: yes, 2017
In this paper, we consider a molecular descriptor called the Wiener polarity index, which is defined as the number of unordered pairs of vertices at distance three in a graph.
Tratnik, Niko
core   +3 more sources

The n-Hosoya Polynomial of 𝑊𝛼⊠ Cβ [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2012
For a wheel  and a cycle  the composite graphs ⊠  is constructed from the union of  and  and  adding the edges  and  , where  is an edge of  and is an edge of . The n – diameter , the  n – Hosoya polynomial and the n – Wiener index of  ⊠  are obtained in
Ahmed Ali, Haveen Ahmed
doaj   +1 more source

CMB Polarization Data and Galactic Foregrounds: Estimation of Cosmological Parameters [PDF]

open access: yes, 1999
We estimate the accuracy with which various cosmological parameters can be determined from the CMB temperature and polarization data when various galactic unpolarized and polarized foregrounds are included and marginalized using the multi-frequency ...
Bond J. R.   +17 more
core   +4 more sources

Correlated noise in networks of gravitational-wave detectors: subtraction and mitigation [PDF]

open access: yes, 2014
One of the key science goals of advanced gravitational-wave detectors is to observe a stochastic gravitational-wave background. However, recent work demonstrates that correlated magnetic fields from Schumann resonances can produce correlated strain noise
Christensen, Nelson   +3 more
core   +2 more sources

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

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   +1 more source

Hosoya Polynomial, Wiener Index, Coloring and Planar of Annihilator Graph of Zn [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2020
Let R be a commutative ring with identity. We consider ΓB(R) an annihilator graph of the commutative ring R. In this paper, we find Hosoya polynomial, Wiener index, Coloring, and Planar annihilator graph of Zn denote ΓB(Zn) , with n= pm or n=pmq, where p,
Mohammed Ahmed   +2 more
doaj   +1 more source

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