Results 31 to 40 of about 3,626 (270)
Topological Indices of the Pent-Heptagonal Nanosheets VC5C7 and HC5C7
Advances in Materials Science and Engineering, 2019 In this paper, we computed the topological indices of pent-heptagonal nanosheet. Formulas for atom-bond connectivity index, fourth atom-bond connectivity index, Randić connectivity index, sum-connectivity index, first Zagreb index, second Zagreb index ...
Fei Deng +4 more
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Acta Chimica Slovenica, 2016 Among topological descriptors, connectivity indices are very important and they have a prominent role in chemistry. The atom-bond connectivity index of a connected graph G is defined as ABC(G)= where dv denotes the degree of vertex v of G and the ...
Wei Gao +2 more
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Topological Indices of Certain Transformed Chemical Structures
Journal of Chemistry, 2020 Topological indices like generalized Randić index, augmented Zagreb index, geometric arithmetic index, harmonic index, product connectivity index, general sum-connectivity index, and atom-bond connectivity index are employed to calculate the bioactivity ...
Xuewu Zuo +4 more
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Vertex-Based Topological Indices of Double and Strong Double Graph of Dutch Windmill Graph
Journal of Chemistry, 2021 A measurement of the molecular topology of graphs is known as a topological index, and several physical and chemical properties such as heat formation, boiling point, vaporization, enthalpy, and entropy are used to characterize them.
Muhammad Asad Ali +3 more
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Some bounds on the modified Randic index [PDF]
Kragujevac Journal of Science, 2015 In this paper, we present some new lower and upper bounds for the modified Randic index in terms of maximum, minimum degree, girth, algebraic connectivity, diameter and average distance.
Mahsa Hemmasi, Ali Iranmanesh
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THE ATOM BOND CONNECTIVITY INDEX OF CERTAIN GRAPHS [PDF]
International Journal of Pure and Apllied Mathematics, 2016 L'indice de connectivité des liaisons atomiques (ABC) fournit un bon modèle pour la stabilité des alcanes linéaires et ramifiés ainsi que l'énergie de déformation des cycloalcanes, qui est définie, nous désignons du le degré de sommet u dans G. Dans cet article, nous étudions la formule générale de l'indice ABC de certains graphes et le collage des ...
Mohanad A. Mohammed +4 more
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Topological aspects of some dendrimer structures
Nanotechnology Reviews, 2018 A numerical number associated to the molecular graph G that describes its molecular topology is called topological index. In the study of QSAR and QSPR, topological indices such as atom-bond connectivity index, Randić connectivity index, geometric index,
Aslam Adnan +3 more
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Computing three topological indices for Titania nanotubes TiO2[m,n]
AKCE International Journal of Graphs and Combinatorics, 2016 A numeric quantity which characterizes the whole structure of a graph is called a topological index. The concept of Generalized Zagreb, atom–bond connectivity (ABC) and geometric–arithmetic (GA) topological indices was established in chemical graph ...
Jia-Bao Liu +3 more
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Topological Indices of Families of Bistar and Corona Product of Graphs
Journal of Mathematics, 2022 Topological indices are graph invariants that are used to correlate the physicochemical properties of a chemical compound with its (molecular) graph. In this study, we study certain degree-based topological indices such as Randić index, Zagreb indices ...
A. Khalid +5 more
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On the Atom-Bond Connectivity index of cacti
Filomat, 2014 The Atom-Bond Connectivity (ABC) index of a connected graph G is defined as ABC(G) = ?uv(E(G)?d(u)+d(v)-2/d(u)d(v), where d(u) is the degree of vertex u in G. A connected graph G is called a cactus if any two of its cycles have at most one common vertex. Denote by G0(n, r) the set of cacti with n vertices and r cycles and G1(n,p) the set of
Hawei Dong, Xiaoxia Wu
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