Results 91 to 100 of about 775 (185)
Trends and multi-annual variability of water temperatures in the river Danube, Serbia [PDF]
, 2016 The relationship between air (Ta) and water temperature (Tw) is very important because it shows how the temperature of a water body might respond to future changes in surface Ta.
Biljana Basarin (7191884) +3 more
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Revan-degree indices on random graphs
, 2022 Given a simple connected non-directed graph $G=(V(G),E(G))$, we consider two families of graph invariants: $RX_\Sigma(G) = \sum_{uv \in E(G)} F(r_u,r_v)$ (which has gained interest recently) and $RX_\Pi(G) = \prod_{uv \in E(G)} F(r_u,r_v)$ (that we ...
Aguilar-Sanchez, R. +3 more
core
Maximal tree and unicylic graph for Euler Sombor index with given diameter
AKCE International Journal of Graphs and CombinatoricsThe study of topological descriptors is essential for understanding the underlying structures of graphs and networks. Numerous numerical descriptors associated with graphs have been used to analyze their overall structure.
Zahid Raza +3 more
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Degree-based graphical indices of $ k $-cyclic graphs [PDF]
Let $ G $ be a graph with edge set $ E(G) $. Let $ d_x $ denote the degree of a vertex $ x $ in $ G $. For a nonnegative integer $ k $, a connected graph of order $ n $ and size $ n+k-1 $ is called a $ k $-cyclic graph. This paper is concerned with $ k $-
Abdulaziz M. Alanazi +5 more
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Comparative energy analysis of spherical fuzzy indices in decision-making problems
International Journal of Mathematics for IndustryMolecular descriptors, such as topological indices (TIs), play a crucial role in network theory, spectral graph theory, and molecular chemistry. Spherical fuzzy graphs (SFGs), an extension of picture fuzzy graphs (PFGs), utilize topological indices from ...
Biswajit Some, Anita Pal
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, 2023 Recently, Gutman defined a new vertex-degree-based graph invariant, named the Sombor index $SO$ of a graph $G$, and is defined by $$SO(G)=\sum_{uv\in E(G)}\sqrt{d_G(u)^2+d_G(v)^2},$$ where $d_G(v)$ is the degree of the vertex $v$ of $G$.
Horoldagva, Batmend, Xu, Chunlei
core
Extremal trees, unicyclic and bicyclic graphs with respect to $p$-Sombor spectral radii
, 2023 For a graph $G=(V,E)$ and $v_{i}\in V$, denote by $d_{v_{i}}$ (or $d_{i}$ for short) the degree of vertex $v_{i}$. The $p$-Sombor matrix $\textbf{S}_{\textbf{p}}(G)$ ($p\neq0$) of a graph $G$ is a square matrix, where the $(i,j)$-entry is equal to ...
Jin, Xian'an +2 more
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DELTA BANHATTI-SOMBOR INDICES OF CERTAIN NETWORKS
INTERNATIONAL JOURNAL OF MATHEMATICS AND COMPUTER RESEARCH, 2023 Recently, a novel degree concept has been defined in Graph Theory: δ vertex degree of a vertex in a graph. In this paper, the first, second, third, fourth, fifth and sixth delta Banhatti-Sombor indices of a graph are defined by using δ vertex degree concept. Furthermore, we compute these newly defined delta Banhatti-Sombor indices for four families of
openaire +1 more source
Labeling on Molecular Graph inducing Topological Indices [PDF]
Graph labeling is the assignment of integers to vertices or edges or both under certain conditions. In this article, we link graph label-ing and topological indices as concepts. We introduce topological indices in particular for specific molecular graphs
J. Gowri, J. Jayapriya
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Main Group Metal ChemistryTopological indices (TIs), as numerical descriptors derived from molecular graphs, offer critical insights into structural properties of chemical compounds by quantifying atomic connectivity, independent of spatial configuration.
Zhang Xiujun +4 more
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