Results 31 to 40 of about 19,763,523 (261)
Computing First General Zagreb Index of Operations on Graphs [PDF]
IEEE Access, 2019 The numerical coding of the molecular structures on the bases of topological indices plays an important role in the subject of Cheminformatics which is a combination of Computer, Chemistry, and Information Science. In 1972, it was shown that the total π-electron energy of a molecular graph depends upon its structure and it can be obtained by the
Jia-Bao Liu +3 more
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SPECIAL GRAPHS AND THEIR ZAGREB INDICES: A COMPARATIVE STUDY [PDF]
Journal of Mechanics of Continua and Mathematical SciencesA simple, finite and connected graph is denoted by G=(V,E). The primary Zagreb index, denoted as M1(G), characterizes the graph topologically by representing a squared degree sum of their vertices.
A. P. Pushpalatha, S. Suganthi
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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 +4 more
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A note on multiplicative sum Zagreb index [PDF]
, 2020 For a nontrivial (molecular) graph G, its multiplicative sum Zagreb index, denoted by π * 1 (G), is defined as the product of the sum is the degree of vertex u.
J South Asian, Math, Zagreb Index
core
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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Extremal Graphs with Respect to the Modified First Zagreb Connection Index [PDF]
2018 20th International Symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC), 2018 Topological indices (TIs) have an important role in studying properties of molecules. A main problem in mathematical chemistry is finding extreme graphs with respect to a given TI. In this paper extremal graphs with respect to the modified first Zagreb connection index for trees in general and for trees with given number of pendants, for unicyclic ...
Guillaume Ducoffe +4 more
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On topological properties of block shift and hierarchical hypercube networks
Open Physics, 2018 Networks play an important role in electrical and electronic engineering. It depends on what area of electrical and electronic engineering, for example there is a lot more abstract mathematics in communication theory and signal processing and networking ...
Guirao Juan Luis García +2 more
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Modified Zagreb connection indices of the T-sum graphs
Main Group Metal Chemistry, 2020 The quantitative structures activity relationships (QSAR) and quantitative structures property relationships (QSPR) between the chemical compounds are studied with the help of topological indices (TI’s) which are the fixed real numbers directly linked ...
Ali Usman, Javaid Muhammad, Kashif Agha
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Molecular Descriptors of Nanotube, Oxide, Silicate, and Triangulene Networks
Journal of Chemistry, 2017 A topological index is a real number associated with chemical constitution purporting for correlation of chemical structure with various physical properties, chemical reactivity, or biological activity.
Wei Gao, Muhammad Kamran Siddiqui
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Zagreb Indices of Trees, Unicyclic and Bicyclic Graphs With Given (Total) Domination
IEEE Access, 2019 Let G = (V, E) be a (molecular) graph. For a family of graphs G, the first Zagreb index M1 and the second Zagreb index M2 have already studied. In particular, it has been presented, the first Zagreb index M1 and the second Zagreb index M2 of trees T in ...
Doost Ali Mojdeh +3 more
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