Results 11 to 20 of about 1,062,219 (211)
About the Zagreb Indices [PDF]
Kemija u Industriji, 2010 The original Zagreb indices and some of their variants, such as the modified Zagreb indices, variable Zagreb indices, reformulated original Zagreb indices, reformulated modified Zagreb indices, Zagreb indices as complexity indices, general Zagreb indices,
Gutman, I. +3 more
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On Variable Zagreb Indices [PDF]
Croatica Chemica Acta, 2004 A novel variant of the Zagreb indices introduced in 1972, called the variable Zagreb indices, is presented. Their performance in the QSPR modeling of lower (C3–C8) alkane boiling points is compared with the original Zagreb indices and their modifications. The variable Zagreb indices produce better single-descriptor models and participate in better two-
Miličević, Ante, Nikolić, Sonja
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New formulae for Zagreb indices
AIP Conference Proceedings, 2017 In this paper, we study with some graph descriptors also called topological indices. These descriptors are useful in determination of some properties of chemical structures and preferred to some earlier descriptors as they are more practical. Especially the first and second Zagreb indices together with the first and second multiplicative Zagreb indices
Yurttaş, Aysun +3 more
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On Zagreb Eccentricity Indices [PDF]
Croatica Chemica Acta, 2011 Zagreb eccentricity indices were proposed analogously to Zagreb indices already known and used for almost forty years. For a connected graph, the first Zagreb eccentricity index is defined as the sum of the squares of the eccentricities of the vertices, and the second Zagreb eccentricity index is defined as the sum of the products of the eccentricities
Trinajstić, Nenad +2 more
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Introducing New Exponential Zagreb Indices for Graphs [PDF]
Journal of Mathematics, 2021 New graph invariants, named exponential Zagreb indices, are introduced for more than one type of Zagreb index. After that, in terms of exponential Zagreb indices, lists on equality results over special graphs are presented as well as some new bounds on ...
Nihat Akgunes, Busra Aydin
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Fuzzy Zagreb Indices and Some Bounds for Fuzzy Zagreb Energy [PDF]
International Journal of Analysis and Applications, 2021 Topological indices M1/M2 known as first/second Zagreb indices are defined as the sum of the sum/product of degrees of pairs of adjacent vertices of a simple graph.
Mahesh Kale, S. Minirani
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First reformulated Zagreb indices of some classes of graphs
Karpatsʹkì Matematičnì Publìkacìï, 2018 A topological index of a graph is a parameter related to the graph; it does not depend on labeling or pictorial representation of the graph. Graph operations plays a vital role to analyze the structure and properties of a large graph which is derived ...
V. Kaladevi +2 more
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ZAGREB INDICES OF A NEW SUM OF GRAPHS [PDF]
Ural Mathematical Journal, 2023 The first and second Zagreb indices, since its inception have been subjected to an extensive research in the physio- chemical analysis of compounds. In [6] Hanyuan Deng et.al computed the first and second Zagreb indices of four new operations on a graph ...
Liju Alex, Gopalapillai Indulal
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Entire Zagreb indices of graphs
Discrete Mathematics, Algorithms and Applications, 2018 The Zagreb indices have been introduced in 1972 to explain some properties of chemical compounds at molecular level mathematically. Since then, the Zagreb indices have been studied extensively due to their ease of calculation and their numerous applications in place of the existing chemical methods which needed more time and increased the costs.
Anwar Alwardi +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.
Matamala, Adelio R. +2 more
core +4 more sources