Results 11 to 20 of about 73,529 (242)
Sharp bounds for the first Zagreb index and first Zagreb coindex [PDF]
Miskolc Mathematical Notes, 2015 Milovanovic, Emina, Milovanovic, Igor
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British Educational Research Journal, EarlyView., 2023 Abstract Children's relationship with time in preschools is an under‐researched area. Young children rarely know how to measure time using a clock, but their experiences of time may contribute to understanding children's well‐being and debates about quality in preschools.
Kristín Dýrfjörð +3 more
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GTI-space : the space of generalized topological indices [PDF]
, 2008 A new extension of the generalized topological indices (GTI) approach is carried out torepresent 'simple' and 'composite' topological indices (TIs) in an unified way.
A.R Matamala +34 more
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The Zagreb indices of graphs with a given clique number [PDF]
, 2011 For a (molecular) graph, the first Zagreb index M1 is equal to the sum of squares of the degrees of vertices, and the second Zagreb index M2 is equal to the sum of the products of the degrees of pairs of adjacent vertices.
Claessen, Femke MAP +5 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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Assessing Graph Robustness through Modified Zagreb Index
Axioms, 2022 Graph robustness or network robustness is the ability that a graph or a network preserves its connectivity or other properties after the loss of vertices and edges, which has been a central problem in the research of complex networks.
Rui Chen, Jianping Li, Weihua He
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Nano-Zagreb Index and Multiplicative Nano-Zagreb Index of Some Graph Operations
International Journal of Computing Science and Applied Mathematics, 2019 Let G be a graph with vertex set V(G) and edge set E(G). The Nano-Zagreb and multiplicative Nano-Zagreb indices of G are NZ(G) = \prod_{uv \in E(G)} (d^2(u) - d^2(v)) and N*Z(G) = \prod_{uv \in E(G)} (d^2(u) - d^2(v)), respectively, where d(v) is the degree of the vertex v.
Akbar Jahanbani, Hajar Shooshtary
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Bounds on the first leap Zagreb index of trees
Karpatsʹkì Matematičnì Publìkacìï, 2021 The first leap Zagreb index $LM1(G)$ of a graph $G$ is the sum of the squares of its second vertex degrees, that is, $LM_1(G)=\sum_{v\in V(G)}d_2(v/G)^2$, where $d_2(v/G)$ is the number of second neighbors of $v$ in $G$.
N. Dehgardi, H. Aram
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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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