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

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   +4 more sources

Reformulated First Zagreb Index of Some Graph Operations [PDF]

open access: yesMathematics, 2015
The reformulated Zagreb indices of a graph are obtained from the classical Zagreb indices by replacing vertex degrees with edge degrees, where the degree of an edge is taken as the sum of degrees of the end vertices of the edge minus 2. In this paper, we
Nilanjan De   +2 more
doaj   +5 more sources

Retracted: On the Reformulated Second Zagreb Index of Graph Operations

open access: yesJournal of Chemistry, 2023
Journal of Chemistry, Volume 2023, Issue 1, 2023.
Journal of Chemistry
doaj   +3 more sources

On the Reformulated Second Zagreb Index of Graph Operations [PDF]

open access: yesJournal of Chemistry, 2021
Topological indices (TIs) are expressed by constant real numbers that reveal the structure of the graphs in QSAR/QSPR investigation. The reformulated second Zagreb index (RSZI) is such a novel TI having good correlations with various physical attributes,
Durbar Maji   +2 more
doaj   +3 more sources

On the Reformulated Multiplicative First Zagreb Index of Trees and Unicyclic Graphs [PDF]

open access: yesDiscrete Dynamics in Nature and Society, 2021
The multiplicative first Zagreb index of a graph H is defined as the product of the squares of the degrees of vertices of H. The line graph of a graph H is denoted by LH and is defined as the graph whose vertex set is the edge set of H where two vertices
Akbar Ali   +4 more
doaj   +2 more sources

On the Bounds of the First Reformulated Zagreb Index [PDF]

open access: yesTurkish Journal of Analysis and Number Theory, 2016
The edge version of traditional first Zagreb index is known as first reformulated Zagreb index. In this paper, we analyze and compare various lower and upper bounds for the first reformulated Zagreb index and we propose new lower and upper bounds which are stronger than the existing and recent results [Appl. Math. Comp. 273 (2016) 16-20].
T. Mansour   +3 more
openaire   +3 more sources

Four new operations related to composition and their reformulated Zagreb index

open access: yesIndonesian Journal of Combinatorics, 2018
The first reformulated Zagreb index EM1(G) of a simple graph G is defined as the sum of the terms (du+dv-2)2 over all edges uv of G. In 2017, Sarala et al. introduced four new operations (F-product) of graphs.
K Pattabiraman, A Santhakumar
doaj   +3 more sources

Structural measures for network biology using QuACN. [PDF]

open access: yesBMC Bioinformatics, 2011
Background Structural measures for networks have been extensively developed, but many of them have not yet demonstrated their sustainably.
Mueller LA   +4 more
europepmc   +3 more sources

About the Zagreb Indices [PDF]

open access: yesKemija u Industriji, 2010
The original Zagreb indices and some of their variants, such as the modified Zagreb indices, variable Zagreb indices, reformulated original Zagreb indices, reformulated modified Zagreb indices, Zagreb indices as complexity indices, general Zagreb indices,
Gutman, I.   +3 more
doaj   +4 more sources

Extremal values of the first reformulated Zagreb index for molecular trees with application to octane isomers

open access: yesAIMS Mathematics, 2023
<abstract><p>A connected acyclic graph in which the degree of every vertex is at most four is called a molecular tree. A number associated with a molecular tree that can help to approximate the physical or chemical properties of the corresponding molecule is called a topological index.
Shabana Anwar   +4 more
openaire   +2 more sources

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