Results 1 to 10 of about 174,518,636 (296)

Estimating vertex-degree-based energies [PDF]

open access: yesVojnotehnički Glasnik, 2022
Introduction/purpose: In the current literature, several dozens of vertexdegree-based (VDB) graph invariants are being studied. To each such invariant, a matrix can be associated.
Ivan Gutman
doaj   +1 more source

On vertex and edge degree-based topological indices

open access: yesVojnotehnički Glasnik, 2023
Introduction/purpose: The entire topological indices (T Ient) are a class of graph invariants depending on the degrees of vertices and edges. Some general properties of these invariants are established.
Ivan Gutman
doaj   +1 more source

Relating graph energy with vertex-degree-based energies [PDF]

open access: yesVojnotehnički Glasnik, 2020
Introduction/purpose: The paper presents numerous vertex-degree-based graph invariants considered in the literature. A matrix can be associated to each of these invariants.
Ivan Gutman
doaj   +1 more source

Rejection and symmetric difference of bipolar picture fuzzy graph

open access: yesDemonstratio Mathematica, 2023
Due to the absence of a negative of three membership functions, there are drawbacks to the existing definition of a picture fuzzy graph (PFG). In that definition of bipolar picture fuzzy graph (BPFG), membership function, neutral membership function ...
Almousa Maha Mohammed, Tchier Fairouz
doaj   +1 more source

Some degree-based topological indices of caboxy-terminated dendritic macromolecule

open access: yesMain Group Metal Chemistry, 2021
In the modern era of the chemical science, the chemical graph theory has contributed significantly to exploring the properties of the chemical compounds.
Rao Yongsheng   +5 more
doaj   +1 more source

Beyond the Zagreb indices

open access: yesAKCE International Journal of Graphs and Combinatorics, 2020
The two Zagreb indices and are vertex-degree-based graph invariants that have been introduced in the 1970s and extensively studied ever since. In the last few years, a variety of modifications of and were put forward. The present survey of these modified
Ivan Gutman   +2 more
doaj   +1 more source

Fuzzy Graph Structures with Application

open access: yesMathematics, 2019
In this article, we introduce the notions of maximal products of fuzzy graph structures, regular fuzzy graph structures, and describe these notions with examples and properties.
Muzzamal Sitara   +2 more
doaj   +1 more source

On the chromatic number of graphs with some restriction of vertex degrees

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2020
Graphs, for which the degree of a certain vertex is equal to (d + 1) and the degrees of all other vertices are at most d , d ≥ 3 , were considered. Properties were obtained to color vertices of these graphs in d colors.
S.N. Selezneva
doaj   +1 more source

PREFERENTIAL ATTACHMENT WITH FITNESS DEPENDENT CHOICE

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2021
We study the asymptotic behavior of the maximum degree in the preferential attachment tree model with a choice based on both the degree and fitness of a vertex.
Y.A. Malyshkin
doaj   +1 more source

Computation of edge- and vertex-degree-based topological indices for tetrahedral sheets of clay minerals

open access: yesMain Group Metal Chemistry, 2022
In terms of soil conditions, clay minerals infrequently occur as homogenous mixtures of single constituents, gatherings, stages, or types of minerals.
Ahmad Al-Nashri Al-Hossain   +2 more
doaj   +1 more source

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