Results 1 to 10 of about 150,131 (321)

On Certain Aspects of Topological Indices [PDF]

Journal of Mathematics, 2021
A topological index, also known as connectivity index, is a molecular structure descriptor calculated from a molecular graph of a chemical compound which characterizes its topology.
Tanweer Ul Islam, Zeeshan Saleem Mufti, Aqsa Ameen, Muhammad Nauman Aslam, Ali Tabraiz   +4 more
doaj   +4 more sources

Extremal topological indices of some nanostructures [PDF]

Heliyon, 2023
In this work, general formulas of degree-based and neighborhood degree sum-based topological indices for a 2D lattice of H-Naphtalenic nanotubes and pent-heptagonal nanosheets are determined.
Shivani Rai, Biswajit Deb, Zahid Raza, Sourav Mondal   +3 more
doaj   +4 more sources

Ve-Degree, Ev-Degree, and Degree-Based Topological Indices of Fenofibrate [PDF]

Journal of Mathematics, 2022
The molecular topology of a graph is described by topological indices, which are numerical measures. In theoretical chemistry, topological indices are numerical quantities that are used to represent the molecular topology of networks.
Sadik Delen, Riaz Hussain Khan, Muhammad Kamran, Nadeem Salamat, A. Q. Baig, Ismail Naci Cangul, M. K. Pandit   +6 more
doaj   +2 more sources

Invariance of topological indices under Hilbert space truncation [PDF]

, 2017
We show that the topological index of a wavefunction, computed in the space of twisted boundary phases, is preserved under Hilbert space truncation, provided the truncated state remains normalizable.
Arovas, Daniel P., Balatsky, Alexander V., Huang, Zhoushen, Zhu, Jian-Xin, Zhu, W.   +4 more
core   +2 more sources

On physical analysis of topological indices for iron disulfide network via curve fitting model [PDF]

Scientific Reports
In this study, we conduct a comprehensive physical analysis of topological indices for the Iron Disulfide (FeS $$_{2}$$ 2 ) network using a curve-fitting model. Iron Disulfide is a cubic compound.
Rongbing Huang, Muhammad Farhan Hanif, Muhammad Kamran Siddiqui, Muhammad Faisal Hanif, Saba Hanif, Brima Gegbe   +5 more
doaj   +2 more sources

QSPR graph model to explore physicochemical properties of potential antiviral drugs of dengue disease through novel coloring-based topological indices [PDF]

Frontiers in Chemistry
Dengue is a viral disease transmitted to humans through mosquito bites. Researchers have investigated various drugs with potential antiviral properties against it. Some of the promising antiviral drugs include UV-4B (N-9-methoxynonyl-1-deoxynojirimycin),
C. Yogalakshmi, B. J. Balamurugan
doaj   +2 more sources

QSPR modeling of some COVID-19 drugs using neighborhood eccentricity-based topological indices: A comparative analysis. [PDF]

PLoS One
Kara Y, Özkan YS, Ullah A, Hamed YS, Belay MB.   +4 more
europepmc   +2 more sources

Novel Degree-Based Topological Descriptors of Fenofibrate Using M-Polynomial

Journal of Mathematics, 2023
Chemical graph theory is currently expanding the use of topological indices to numerically encode chemical structure. The prediction of the characteristics provided by the chemical structure of the molecule is a key feature of these topological indices ...
Muhammad Kamran, Muhammad Farman, Seyma Ozon Yildirim, Sadik Delen, Ismail Naci Cangul, Maria Akram, M. K. Pandit   +6 more
doaj   +1 more source

ISI(G) Topological Index of Sum Graphs For Some Finite Groups

Academic Science Journal, 2023
A topological index can capture much information about a mathematical structure into an actual number. The topological indices have an essential role in theoretical mathematics.
mahera rabee
doaj   +1 more source

Topological Descriptors on Some Families of Graphs

Journal of Chemistry, 2021
In view of the successful applications of graph theory, relationships between the biological activity and chemical structure have been developed. One of the popular topics in graph theory is problems relating to topological indices.
Iftikhar Ahmad, Maqbool Ahmad Chaudhry, Muhammad Hussain, Tariq Mahmood   +3 more
doaj   +1 more source