Results 11 to 20 of about 78 (66)
On Singular Signed Graphs with Nullspace Spanned by a Full Vector: Signed Nut Graphs
Discussiones Mathematicae Graph Theory, 2022 A signed graph has edge weights drawn from the set {+1, −1}, and is sign-balanced if it is equivalent to an unsigned graph under the operation of sign switching; otherwise it is sign-unbalanced.
Bašić Nino +3 more
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On the first Zagreb index of graphs with Self-Loops
AKCE International Journal of Graphs and Combinatorics, 2023 Some of the most comprehensively studied degree-based topological indices are the Zagreb indices. The first Zagreb index [Formula: see text] of a graph G is defined as the sum of squares of the degrees of the vertices.
Shashwath S. Shetty, Arathi Bhat K
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Some topological indices of dendrimers determined by their Banhatti polynomials
Heterocyclic Communications, 2020 Several properties of chemical compounds in a molecular structure can be determined with the aid of mathematical languages provided by various types of topological indices.
Chu Zheng-Qing +6 more
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Spectral properties of balanced trees and dendrimers
, 2022 We investigate the spectral properties of balanced trees and dendrimers, with a view toward unifying and improving the existing results. Here we find a semi-factorized formula for their characteristic polynomials.
Damnjanović, Ivan +2 more
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, 2023 The network systems and graphical analysis through the study ofstructural characteristics is a vast field of growing importance inresearch. Topological indices have a significant and crucial role inthe study of structure–property relationships.
Ishita Sarkar +2 more
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Bounds for the Gutman-Milovanovic index and some applications [PDF]
In this paper, we examine the Gutman-Milovanovic index and establish new upper and lower bounds for it. These bounds include terms related to the general sum connectivity index, the general second Zagreb index, and the hyperbolicity constant of the ...
Granados, Ana +3 more
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Extremal polygonal chains with respect to the Kirchhoff index
, 2023 The Kirchhoff index is defined as the sum of resistance distances between all pairs of vertices in a graph. This index is a critical parameter for measuring graph structures.
Ma, Qi
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New bounds for variable topological indices and applications [PDF]
One of the most important information related to molecular graphs is given by the determination (when possible) of upper and lower bounds for their corresponding topological indices. Such bounds allow to establish the approximate range of the topological
Granados, Ana +3 more
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Multiplicative topological indices: Analytical properties and application to random networks [PDF]
We consider two general classes of multiplicative degree-based topological indices (MTIs). This work has three objectives: First, we follow an analytical approach to deal with a classical topic in the study of topological indices: to find inequalities ...
Aguilar Sánchez, Rocío +3 more
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Main Group Metal ChemistrySilane compounds are a class of chemical compounds composed of silicon (Si) and hydrogen (H), characterized by the general formula SiH4−xRx{{\rm{SiH}}}_{4-x}{R}_{x}, where RR represents various organic groups. The simplest member of this family is silane
Zhang Xiujun +4 more
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