Results 21 to 30 of about 25,433 (194)

Bounds and extremal graphs of second reformulated Zagreb index for graphs with cyclomatic number at most three

open access: yesKuwait Journal of Science, 2021
Mili\v{c}evi\'{c} \textit{et al.}, in 2004, introduced topological indices known as Reformulated Zagreb indices, where they modified Zagreb indices using the edge-degree instead of vertex degree.
Abhay Rajpoot, Lavanya Selvaganesh
doaj   +1 more source

First reformulated Zagreb indices of some classes of graphs

open access: yesKarpatsʹkì 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
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

A GPU-based hyperbolic SVD algorithm [PDF]

open access: yes, 2011
A one-sided Jacobi hyperbolic singular value decomposition (HSVD) algorithm, using a massively parallel graphics processing unit (GPU), is developed.
A.H. Sameh   +21 more
core   +2 more sources

Novel Modifications of Parallel Jacobi Algorithms [PDF]

open access: yes, 2011
We describe two main classes of one-sided trigonometric and hyperbolic Jacobi-type algorithms for computing eigenvalues and eigenvectors of Hermitian matrices. These types of algorithms exhibit significant advantages over many other eigenvalue algorithms.
A Sluis van der   +27 more
core   +2 more sources

M-Polynomials and Degree-Based Topological Indices of the Molecule Copper(I) Oxide

open access: yesJournal of Chemistry, 2021
Topological indices are numerical parameters used to study the physical and chemical residences of compounds. Degree-based topological indices have been studied extensively and can be correlated with many properties of the understudy compounds.
Faryal Chaudhry   +5 more
doaj   +1 more source

Some Reverse Degree-Based Topological Indices and Polynomials of Dendrimers

open access: yesMathematics, 2018
Topological indices collect information from the graph of molecule and help to predict properties of the underlying molecule. Zagreb indices are among the most studied topological indices due to their applications in chemistry.
Wei Gao   +4 more
doaj   +1 more source

On Zagreb Indices as Complexity Indices

open access: yesCroatica chemica acta, 2000
Two original Zagreb indices, denoted M1 and M2, and introduced in 1972, were symmetry-modified by summing up only degrees (SMM1) or edge-weights (SMM2) of symmetry nonequivalent vertices or edges of graphs. Their dependence on the structural features and symmetry of molecular graphs is studied. They were also compared to eight other complexity indices (
Baučić, Ivo   +3 more
openaire   +5 more sources

On the Zagreb indices equality

open access: yesDiscrete Applied Mathematics, 2012
11 pages, 1 ...
Abdo, Hosam   +2 more
openaire   +3 more sources

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

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