Results 31 to 40 of about 51,609 (309)

Mostar Index of Cycle-Related Structures

Journal of Chemistry, 2022
A topological index is a numerical quantity associated with the molecular structure of a chemical compound. This number remains fixed with respect to the symmetry of a molecular graph.
Fatima Asif, Agha Kashif, Sohail Zafar, Michael Onyango Ojiema   +3 more
doaj   +1 more source

Relating the ABC and harmonic indices [PDF]

Journal of the Serbian Chemical Society, 2014
The atom-bond connectivity (ABC) index is a much-studied molecular structure descriptor, based on the degrees of the vertices of the molecular graph.
Gutman Ivan, Zhong Lingping, Xu Kexiang
doaj   +1 more source

Degree-Based Topological Indices of Boron B12

Journal of Chemistry, 2021
Topological index sometimes called molecular descriptor is a numerical value which associates a chemical composition for correlating chemical structure with numerous physical properties, chemical reactivity, or biological activity.
Nouman Saeed, Kai Long, Zeeshan Saleem Mufti, Hafsa Sajid, Abdul Rehman   +4 more
doaj   +1 more source

Identification of a class of index models: A topological approach [PDF]

The Econometrics Journal, 2020
Summary We establish nonparametric identification in a class of so-called index models by using a novel approach that relies on general topological results. Our proof strategy requires substantially weaker conditions on the functions and distributions characterising the model than those required by existing strategies; in particular, it ...
Mogens Fosgerau, Dennis Kristensen
openaire   +5 more sources

The topological period-index conjecture for spinc 6-manifolds [PDF]

, 2020
First published in Annals of K-Theory in Vol. 5 (2020), No. 3, published by Mathematical Sciences Publishers. © 2020 Mathematical Sciences Publishers.The Topological Period-Index Conjecture is a hypothesis which relates the period and index of elements ...
Crowley, D, Grant, M
core   +1 more source

Computing SS Index of Certain Dendrimers

Journal of Mathematics, 2021
The numerical descriptor gathers the data from the molecular graphs and helps to know the characteristics of the chemical structure known as topological index.
Weidong Zhao, M.C. Shanmukha, A. Usha, Mohammad Reza Farahani, K.C. Shilpa   +4 more
doaj   +1 more source

GTI-space : the space of generalized topological indices

, 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, A.R., Matamala, Adelio R., Estrada, Ernesto, Ramon y Cajal program Spain (Funder), , Ramon y Cajal program Spain (Funder), Estrada, E.   +5 more
core   +1 more source

Topological Indices of H-Naphtalenic Nanosheet

Open Chemistry, 2018
In chemical graph theory, a single numeric number related to a chemical structure is called a topological descriptor or topological index of a graph.
Idrees Nazeran, Jawwad Saif Muhammad, Sadiq Afshan, Rauf Asia, Hussain Fida   +4 more
doaj   +1 more source

On The Forgetten Topological Index and Co Index

European Journal of Science and Technology, 2019
G’ nin unutulmus topolojiksel indeksi 𝑑𝑖 ve 𝑑𝑗 dereceleriyle tanimlanir. Bu makalede, unutulmus topolojiksel indeksin ozdegerleri icin bazi sinirlar bulunmustur ve unutulmus Estrada topolojiksel indeks ile ilgili bazi esitsizlikler belirlenmistir.
openaire   +3 more sources

Entire forgotten topological index of graphs

, 2020
The Forgotten topological index or F-index is defined as the sum of cubes of the degrees of vertices of a graph. For this classical F-index, we ignore the intermolecular forces that exist between the atoms and bonds and consider only the intermolecular ...
Buragohain, Jibonjyoti, Bharali, A., Doley, Amitav   +2 more
core   +1 more source