Results 51 to 60 of about 39,174 (128)

On QSAR modeling with novel degree-based indices and thermodynamics properties of eye infection therapeutics

Frontiers in Chemistry
Topological descriptors are numerical results generated from the structure of a chemical graph that are useful in identifying the physicochemical characteristics of a wide range of drugs.
Muhammad Waheed Rasheed, Abid Mahboob, Iqra Hanif   +2 more
doaj   +1 more source

On Irregularity Measures in Trees with Fibonacci Degree Sequences

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
In this paper, degree-based topological indices are fundamental graph invariants used to quantify structural irregularity. Let G=(V,E) be a simple tree with vertex degrees dv for  v∈V(G).
Hamoud, J., Belov, A.Ya., Abdullah, D., Almahalebi, M.   +3 more
doaj   +1 more source

Entropies and Degree-Based Topological Indices of Generalized Sierpiński Graphs

Fractal and Fractional
Fractals are geometric patterns that appear self-similar across all length scales and are constructed by repeating a single unit on a regular basis. Entropy, as a core thermodynamic function, is an extension based on information theory (such as Shannon ...
Si-Ao Xu, Jia-Dong Si, Jia-Bao Liu
doaj   +1 more source

Wiener index application in intuitionistic fuzzy rough graphs for transport network flow

Scientific Reports
The applicability of different topological indices is indispensable in fields such as chemistry, electronics, economics, business studies, medicine, and the social sciences.
Noorjahan Shaik, Sharief Basha Shaik
doaj   +1 more source

BiRch:a bidirectional search algorithm for k-step reachability queries

Tongxin xuebao, 2015
A new bidirectional processing algorithm,namely BiRch was proposed.When checking whether a vertex u can reach v within k steps,BiRch firstly compared the out-degree of u and the in-degree of v,and processed the one with smaller degree,such that to avoid ...
Jun-feng ZHOU, Wei CHEN, Chun-ping FEI, Zi-yang CHEN   +3 more
doaj   +2 more sources

On Sombor indices of generalized tensor product of graph families

Results in Control and Optimization
Graph invariants are extensively being used in different fields for analysing the structural properties of different compounds. Several topological indices, their properties and relations between different indices have been explored. Ivan Gutman recently
Nadar Jenita Mary Masilamani Raja, A. Anuradha   +1 more
doaj   +1 more source

The Neighbor Degree Sum — Distance Index of the Graph

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
In this paper, we introduce three novel topological indices for a connected undirected graph G without loops or multiple edges. The indices are based on the sum of neighbor degrees and the distances between vertices, offering an enhancement over ...
Asha, T.V., Chaluvaraju, B.
doaj   +1 more source

Graphs with given connectivity and their minimum Sombor index having applications to QSPR studies of monocarboxylic acids

Heliyon
The Sombor index, introduced by Gutman in 2021, represents a novel graphical topological descriptor reliant upon graph degree information. It holds promise for elucidating the thermodynamic behavior of compounds.
Sakander Hayat, Muhammad Arshad, Asad Khan   +2 more
doaj   +1 more source

Spectral norm and energy of a digraph with respect to a VDB topological index

Heliyon
The set of singular values of a digraph with respect to a vertex-degree based topological index is the set of all singular values of its general adjacency matrix.
Carlos Espinal, Juan Monsalve, Juan Rada
doaj   +1 more source

Bounds on the Euler Sombor index of maximal outerplanar graphs [PDF]

Electronic Journal of Mathematics
Yifan Hu, Jingling Fang, Yuexi Liu, Zhen Lin   +3 more
doaj   +1 more source