Results 21 to 30 of about 73,809 (233)
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
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National vs. international journals: views of medical professionals in Croatia [PDF]
, 2008 Scholarly journals, especially in non-English-speaking countries, may perform very different functions depending on whether they are published for national or international audiences.
Hren, Darko +5 more
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On α-adjacency energy of graphs and Zagreb index [PDF]
AKCE International Journal of Graphs and Combinatorics, 2021 Let $A(G)$ be the adjacency matrix and $D(G)$ be the diagonal matrix of the vertex degrees of a simple connected graph $G$. Nikiforov defined the matrix $A_ (G)$ of the convex combinations of $D(G)$ and $A(G)$ as $A_ (G)= D(G)+(1- )A(G)$, for $0\leq \leq 1$.
S. Pirzada +3 more
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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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Computing Topological Indices and Polynomials for Line Graphs
Mathematics, 2018 A topological index is a number related to the atomic index that allows quantitative structure–action/property/toxicity connections. All the more vital topological indices correspond to certain physico-concoction properties like breaking point ...
Shahid Imran +3 more
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Computing Topological Descriptors and Polynomials of Certain 2D Chemical Structures
Journal of Chemistry, 2021 In the fields of mathematical chemistry, a topological index, also known as a connectivity index, is a type of a molecular descriptor that is calculated based on the molecular graph of a chemical compound.
Muhammad Mubashir Izhar +6 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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Extremal graphs of multiplicative sum Zagreb index [PDF]
Notes on Number Theory and Discrete MathematicsThe multiplicative sum Zagreb index, regarded as the multiplicative version of the first Zagreb index, is defined as the product of the degree sum over all pairs of adjacent vertices.
Chunlei Xu +3 more
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Bounds for the augmented Zagreb index
Theory and Applications of Graphs, 2023 Summary: The augmented Zagreb index (AZI for short) of a graph \(G\), introduced by \textit{B. Furtula} et al. [J. Math. Chem. 48, No. 2, 370--380 (2010; Zbl 1196.92050)] is defined as AZI\((G)=\sum_{v_iv_j\in E(G)}\left(\frac{d(v_i)d(v_j)}{d(v_i)+d(v_j)-2}\right)^3\), where \(E(G)\) is the edge set of \(G\), and \(d(v_i)\) denotes the degree of the ...
qingcuo, Ren +3 more
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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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