Results 21 to 30 of about 32,921 (201)

Quantifying some distance topological properties of the non-zero component graph

AIMS Mathematics, 2021
Several bioactivities of chemical compounds in a molecular graph can be expected by using many topological descriptors. A topological descriptor is a numeric quantity which quantify the topology of a graph.
Fawaz E. Alsaadi, Faisal Ali, Imran Khalid , Masood Ur Rehman, Muhammad Salman, Madini Obad Alassafi, Jinde Cao   +6 more
doaj   +1 more source

Distance-Based Polynomials and Topological Indices for Hierarchical Hypercube Networks

Journal of Mathematics, 2021
Topological indices are the numbers associated with the graphs of chemical compounds/networks that help us to understand their properties. The aim of this paper is to compute topological indices for the hierarchical hypercube networks. We computed Hosoya
Tingmei Gao, Iftikhar Ahmed
doaj   +1 more source

Computing the Hosoya Polynomial of M-th Level Wheel and Its Subdivision Graph

Journal of Chemistry, 2021
The determination of Hosoya polynomial is the latest scheme, and it provides an excellent and superior role in finding the Weiner and hyper-Wiener index. The application of Weiner index ranges from the introduction of the concept of information theoretic
Peng Xu, Muhammad Numan, Aamra Nawaz, Saad Ihsan Butt, Adnan Aslam, Asfand Fahad   +5 more
doaj   +1 more source

Topological Indices of Graphs from Vector Spaces

Mathematics, 2023
Topological indices are numbers that are applied to a graph and can be used to describe specific graph properties through algebraic structures. Algebraic graph theory is a helpful tool in a range of chemistry domains.
Krishnamoorthy Mageshwaran, Nazeek Alessa, Singaravelu Gopinath, Karuppusamy Loganathan   +3 more
doaj   +1 more source

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

, 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.
A.R Matamala, A.R Matamala, A.T Balaban, Adelio R. Matamala, B Zhou, D. Plavšić, D.J Klein, D.J Klein, D.J Klein, E Estrada, E Estrada, E. Estrada, E. Estrada, E. Estrada, E. Estrada, E. Estrada, Ernesto Estrada, G.G Cash, H Wiener, H.P Schultz, H.P Schultz, I Gutman, I Gutman, I Gutman, I Gutman, J. Gálvez, J. Gálvez, J.R Votano, M. Randić, M. Randić, O Ivanciuc, R Todeschini, R.F Brown, W.R. Müller, Z. Mihalić   +34 more
core   +1 more source

Hosoya Polynomials Of Some Semiconducotors

Journal 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, AbdulJalil M. Khalaf, Emad A. Jaffar AL-Mulla   +2 more
doaj   +1 more source

Stein's method meets Malliavin calculus: a short survey with new estimates [PDF]

, 2009
We provide an overview of some recent techniques involving the Malliavin calculus of variations and the so-called ``Stein's method'' for the Gaussian approximations of probability distributions.
Nourdin, Ivan, Peccati, Giovanni
core   +6 more sources

The Connectivity and the Harary Index of a Graph [PDF]

, 2012
The Harary index of a graph is defined as the sum of reciprocals of distances between all pairs of vertices of the graph. In this paper we provide an upper bound of the Harary index in terms of the vertex or edge connectivity of a graph.
Das, Diudea, Estrada, Feng, He, Ilić, Ivanciuc, Lučić, Plavčsić, Wiener, Xiao-Xin Li, Xu, Xu, Xu, Xu, Yi-Zheng Fan, Yu, Zhou   +17 more
core   +1 more source

The Hyper-Wiener Index of One-pentagonal Carbon Nanocone [PDF]

Current Nanoscience, 2013
One-pentagonal carbon nanocone consists of one pentagon as its core surrounded by layers of hexagons. If there are n layers, then the graph of the molecules is denoted by Gn. In this paper our aim is to explicitly calculate the hyper-Wiener index of Gn.
Khalifeh, M. H., Darafsheh, M. R., Jolany, Hassan   +2 more
openaire   +2 more sources

Punctuated equilibria and 1/f noise in a biological coevolution model with individual-based dynamics [PDF]

, 2003
We present a study by linear stability analysis and large-scale Monte Carlo simulations of a simple model of biological coevolution. Selection is provided through a reproduction probability that contains quenched, random interspecies interactions, while ...
A. Roberts, B. Drossel, C.C. Wilmers, C.E. Shannon, C.E. Shannon, C.M. Newman, D. Chowdhury, E. Tüzel, E. Tüzel, F. Daerden, I. Procaccia, I.D. Rozdilsky, J. Davidsen, J. Maynard Smith, J.A.J. Metz, K. Christensen, M. Doebeli, M. Eigen, M. Eigen, M. Hall, M. Howard, M.E. Gilpin, M.E.J. Newman, M.E.J. Newman, M.R. Gardner, P. Bak, P. Bak, P. Bak, P.A. Rikvold, P.A. Rikvold, P.F. Verhulst, P.H. Leslie, P.H. Leslie, Per Arne Rikvold, R. K. P. Zia, R.M. May, R.V. Solé, R.V. Solé, S.A. di Collobiano, S.A. Kauffman, S.J. Gould, S.J. Gould, T. Tregonning, T.J. Penna   +43 more
core   +1 more source