Results 1 to 10 of about 4,554,566 (196)

Assessing Graph Robustness through Modified Zagreb Index

open access: yesAxioms, 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
doaj   +2 more sources

Hyper-Zagreb index in fuzzy environment and its application [PDF]

open access: yesHeliyon
The Zagreb indices (ZIs) are important graph invariants that are used extensively in many different fields in mathematics and chemistry, such as network theory, spectral graph theory, fuzzy graph theory (FGT) and molecular chemistry, etc. The hyper-ZI is
Sk Rabiul Islam   +2 more
doaj   +2 more sources

A Statistical Comparison between Zagreb indices for correlation with toxicity predictions of natural products

open access: yesInternational Journal of Research in Pharmaceutical Sciences, 2022
Graph theory had wide applications in developing in silico tools and it is widely used to calculate topological indices to establish structural activity relations of chemicals/compounds.
Siva Parvathi M.   +2 more
doaj   +1 more source

Extremal hyper-Zagreb index of trees of given segments with applications to regression modeling in QSPR studies

open access: yesAlexandria Engineering Journal, 2023
Introduced by Gutman & Trinajstić in 1972, the two well-known Zagreb indices efficiently determine the total π-electron energy of alternant hydrocarbons. The hyper-Zagreb index is a variant of the classical first Zagreb index.
Sakander Hayat   +4 more
doaj   +1 more source

Certain topological indices and polynomials for the semitotal-point graph and line graph of semitotal-point graph for Dutch windmill graph

open access: yesIndonesian Journal of Combinatorics, 2020
Dutch windmill graph [1, 2] and denoted by Dnm. Order and size of Dutch windmill graph are (n−1)m+1 and mn respectively. In this paper, we computed certain topological indices and polynomials i.e.
Salma Kanwal   +4 more
doaj   +1 more source

Study of Neighborhood Degree-Based Topological Indices via Direct and NM-Polynomial of Starphene Graph

open access: yesJournal of Function Spaces, 2022
Our objective is to compute the neighborhood degree-based topological indices via NM-polynomial for starphene. In the neighborhood degree-based topological indices, we compute the third version of the Zagreb index; neighborhood second Zagreb index ...
Deeba Afzal   +5 more
doaj   +1 more source

Topological Properties of Degree-Based Invariants via M-Polynomial Approach

open access: yesJournal of Mathematics, 2022
Chemical graph theory provides a link between molecular properties and a molecular graph. The M-polynomial is emerging as an efficient tool to recover the degree-based topological indices in chemical graph theory.
Samirah Alsulami   +4 more
doaj   +1 more source

Maximum Second Zagreb Index Of Trees With Given Roman Domination Number [PDF]

open access: yesTransactions on Combinatorics, 2023
Chemical study regarding total $\pi$-electron energy with respect to conjugated molecules has focused on the second Zagreb index of graphs. Moreover, in the last half-century, it has gotten a lot of attention.
Ayu Ameliatul Ahmad Jamri   +3 more
doaj   +1 more source

Topological Indices of Families of Bistar and Corona Product of Graphs

open access: yesJournal 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
doaj   +1 more source

Topological Indices of the Pent-Heptagonal Nanosheets VC5C7 and HC5C7

open access: yesAdvances 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
doaj   +1 more source

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