Results 51 to 60 of about 572,605 (265)
Indonesian Journal of Combinatorics, 2020 Dutch windmill graph [1, 2] and denoted by Dnm. Order and size of Dutch windmill graph are (n−1)m+1 and mn respectively. In this paper, we computed certain topological indices and polynomials i.e.
Salma Kanwal +4 more
doaj +1 more source
Some chemical indices related to the number of triangles [PDF]
Transactions on Combinatorics, 2023 Many chemical indices have been invented in theoretical chemistry, such as the Zagreb index, the Lanzhou index, the forgotten index, the Estrada index etc.
Mihrigul Wali
doaj +1 more source
Novel Modifications of Parallel Jacobi Algorithms [PDF]
, 2011 We describe two main classes of one-sided trigonometric and hyperbolic Jacobi-type algorithms for computing eigenvalues and eigenvectors of Hermitian matrices. These types of algorithms exhibit significant advantages over many other eigenvalue algorithms.
A Sluis van der +27 more
core +2 more sources
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
doaj +1 more source
On the first Zagreb Index of Polygraphs
Electronic Notes in Discrete Mathematics, 2014 Abstract One of the most popular topological indices is the Zagreb index, introduced by Gutman and Trinajstic in 1972, which is the sum of squares of degree sequence of a (chemical) graph G. In this paper, we obtain an upper bound for the Zagreb index of polygraphs, rotagraphs and fasciagraphs.
Hossein Shabani, Reza Kahkeshani
openaire +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source