Zobrazeno 1 - 10
of 4 059
pro vyhledávání: '"Topological index"'
Autor:
Akbar Ali, Sneha Sekar, Selvaraj Balachandran, Suresh Elumalai, Abdulaziz M. Alanazi, Taher S. Hassan, Yilun Shang
Publikováno v:
AIMS Mathematics, Vol 9, Iss 11, Pp 32552-32570 (2024)
Consider a tree graph $ G $ with edge set $ E(G) $. The notation $ d_G(x) $ represents the degree of vertex $ x $ in $ G $. Let $ \mathfrak{f} $ be a symmetric real-valued function defined on the Cartesian square of the set of all distinct elements o
Externí odkaz:
https://doaj.org/article/ce79b14be2a6467da55124bcb709b249
Autor:
Shaikh Ibrahim Abdullah, Sovan Samanta, Kajal De, Antonios Kalampakas, Jeong Gon Lee, Tofigh Allahviranloo
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-24 (2024)
Abstract Topological indices are the numbers that remain constant under graph automorphism. Topological indices describe a network’s connectivity, structure, and topological characteristics. These indices have many applications in crisp graphs. How
Externí odkaz:
https://doaj.org/article/dc5741d650314be8a2fd9d82b3c43f1e
Publikováno v:
Electronic Journal of Mathematics, Vol 8, Pp 39-47 (2024)
Externí odkaz:
https://doaj.org/article/ace0b88befa84054895e700ed94388ec
Publikováno v:
Ecological Processes, Vol 13, Iss 1, Pp 1-19 (2024)
Abstract Background In resource-based cities, long-term irrational exploitation of resources has caused severe damage to ecosystem functions, mainly manifested in the significant decline of biodiversity, land degradation, water pollution, and the det
Externí odkaz:
https://doaj.org/article/742b2eb6b5d24c428a6c419b66d2f381
Autor:
Palaniyappan Nithya, Suresh Elumalai, Selvaraj Balachandran, Akbar Ali, Zahid Raza, Adel A. Attiya
Publikováno v:
Discrete Mathematics Letters, Vol 13, Pp 135-142 (2024)
Externí odkaz:
https://doaj.org/article/b56ed2ecb0984ce991a01930cb9bf683
Publikováno v:
Heliyon, Vol 10, Iss 17, Pp e37209- (2024)
In chemical graph theory, topological indices play an important role and have various uses in quantitative structure-property relationships (QSPR) as well as quantitative structure-activity relationships (QSARs). The Hosoya index is one of them, perf
Externí odkaz:
https://doaj.org/article/d51dc7342d9148218a1a411bb7cd1d35
Publikováno v:
Examples and Counterexamples, Vol 5, Iss , Pp 100129- (2024)
In this paper, we determine some degree-based topological indices, such as the Sombor index, the first and second Zagreb indices, the forgotten topological index, the Narumi–Katayama index, the first and second multiplicative Zagreb indices, the at
Externí odkaz:
https://doaj.org/article/70fd9e4afbc54e12aa516c92cd42a5af
Publikováno v:
AIMS Mathematics, Vol 9, Iss 2, Pp 3646-3670 (2024)
We consider two general classes of multiplicative degree-based topological indices (MTIs), denoted by $ X_{\Pi, F_V}(G) = \prod_{u \in V(G)} F_V(d_u) $ and $ X_{\Pi, F_E}(G) = \prod_{uv \in E(G)} F_E(d_u, d_v) $, where $ uv $ indicates the edge of $
Externí odkaz:
https://doaj.org/article/64abeb91b3fd4947bc1975057487d129
Publikováno v:
Contributions to Mathematics, Vol 9, Pp 33-37 (2024)
Externí odkaz:
https://doaj.org/article/90a26875fbcd40f199683bcb0c33d413
Publikováno v:
South African Journal of Chemical Engineering, Vol 48, Iss , Pp 121-129 (2024)
Topological indices (TIs) are mathematical codings of the molecular graphs that predict the physicochemical, biological, toxicological, and structural properties of the chemical compounds. To evaluate the physical and chemical properties of molecules
Externí odkaz:
https://doaj.org/article/b94234007cf04e2788bfd728b6b2b13f