Results 41 to 50 of about 572,605 (265)

Zagreb indices of some chemical structures using new products of graphs [PDF]

Journal of Hyperstructures, 2023
Zagreb indices are one of the most extensively studied degree-based structural descriptors for analyzing various physicochemical properties of chemical compounds.
Liju Alex, Indulal Gopal
doaj   +1 more source

Maximum first Zagreb index of orientations of unicyclic graphs with given matching number [PDF]

Applied Mathematics and Computation, 2021
Let $D=(V,A)$ be a digraphs without isolated vertices. The first Zagreb index of a digraph $D$ defined as a summation over all arcs, $M_1(D)=\frac{1}{2}\sum\limits_{uv\in A}(d^{+}_{u}+d^{-}_v)$, where $d^{+}_u$(resp.
Jiaxiang Yang, H. Deng
semanticscholar   +1 more source

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

Journal 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, Saira Hameed, Usman Ashraf, Arif Mehmood, Faryal Chaudhry, Dhan Kumari Thapa   +5 more
doaj   +1 more source

The First Zagreb Index, the Independence Number and Some Hamiltonian Properties of Graphs [PDF]

Open Journal of Discrete Mathematics
Rao Li
semanticscholar   +2 more sources

Young children's perspectives of time: New directions for co‐constructing understandings of quality in ECEC

British Educational Research Journal, EarlyView., 2023
Abstract Children's relationship with time in preschools is an under‐researched area. Young children rarely know how to measure time using a clock, but their experiences of time may contribute to understanding children's well‐being and debates about quality in preschools.
Kristín Dýrfjörð, Anna Magnea Hreinsdóttir, Adrijana Visnjic‐Jevtic, Alison Clark   +3 more
wiley   +1 more source

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

Journal 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, Sabir Hussain, Farkhanda Afzal, Mohammad Reza Farahani, Deeba Afzal   +4 more
doaj   +1 more source

Sufficient Conditions for a Graph to Be L-Path-Coverable or L-Edge-Hamiltonian in Terms of the First Zagreb Index

Social Science Research Network, 2022
Mingqiang An, Huiya Yan
semanticscholar   +2 more sources

GTI-space : the space of generalized topological indices [PDF]

, 2008
A new extension of the generalized topological indices (GTI) approach is carried out torepresent 'simple' and 'composite' topological indices (TIs) in an unified way.
A.R Matamala, A.R Matamala, A.T Balaban, Adelio R. Matamala, B Zhou, D. Plavšić, D.J Klein, D.J Klein, D.J Klein, E Estrada, E Estrada, E. Estrada, E. Estrada, E. Estrada, E. Estrada, E. Estrada, Ernesto Estrada, G.G Cash, H Wiener, H.P Schultz, H.P Schultz, I Gutman, I Gutman, I Gutman, I Gutman, J. Gálvez, J. Gálvez, J.R Votano, M. Randić, M. Randić, O Ivanciuc, R Todeschini, R.F Brown, W.R. Müller, Z. Mihalić   +34 more
core   +1 more source

The multiplicative reformulated first Zagreb index of some graph operations

Malaya Journal of Matematik, 2020
M. Aruvi
openaire   +3 more sources

The Zagreb indices of graphs with a given clique number [PDF]

, 2011
For a (molecular) graph, the first Zagreb index M1 is equal to the sum of squares of the degrees of vertices, and the second Zagreb index M2 is equal to the sum of the products of the degrees of pairs of adjacent vertices.
Claessen, Femke MAP, Diercks, Ronald, Doornberg, Job N., Kolovich, Gregory P., Peters, Rinne, van den Bekerom, Michel P. J.   +5 more
core   +2 more sources